Memory


G.Skill Reveals 2x8GB DDR4-4266 C19 and 4x16GB DDR4-3466 C14 Kits

G.Skill Reveals 2x8GB DDR4-4266 C19 and 4x16GB DDR4-3466 C14 Kits

Until recently enthusiasts who would like to use the fastest DDR4 memory with their Skylake-S processors had to use 4 GB DIMMs based on 4 Gb chips, typically sold in pairs for a 8 GB total memory. This week G.Skill has introduced three new sets of Trident Z memory modules that come with either an extremely high clock rate, or very aggressive timings. 

The new G.Skill Trident Z memory modules based on Samsung’s 8 Gb DDR4 ICs and are available in 8 GB and 16 GB versions. The 8 GB DRAM sticks are rated to run at 3200 (CL13 13-13-33), 3466 (CL14 14-14-34) or 4266 (CL19 23-23-43) MT/s data rates, whereas 16 GB modules can work at 3200 and 3466 MT/s data rates at the aforementioned timings, with all kits running at the recommended DDR4 enthusiast setting of 1.35 volts. Like the rest of the Trident Z modules, the new sticks feature aluminum heat spreaders and custom black PCBs developed by G.Skill.

The new Trident Z modules are designed for Intel’s Skylake-S processors when used in Intel’s Z170-based motherboards which support XMP 2.0 technology (to automatically set their clock rates when they are installed into appropriate PCs). Using the ‘performance index’ metric from our memory reviews as a rough indication of general performance (rough in the sense that some workloads are frequency dependent, others are latency driven), the 3200 C13 modules come in at a PI of 246, the 3466 C14 modules have a PI of 248, and the 4299 C19 are at 225. Historically a higher frequency is harder to validate for reliability than a lower CAS Latency, and represents the main challenge when producing high-performance modules.

Because high-speed memory often needs to be validated with specific motherboards, so far G.Skill has validated its DDR4-4266 modules featuring 8 Gb chips on the ASUS ROG Maximus VIII Impact mainboard, but we expect that to expand over time. Meanwhile, the 8 GB and 16 GB DDR4-3200 and DDR4-3466 should work on many other motherboards as well. It is important to keep in mind that Intel’s HEDT platforms (Haswell-E) are more limited for extreme memory frequencies, which is why G.Skill officially has not validated the aforementioned modules on the Intel X99.

Exact prices of the new Trident Z memory modules from G.Skill are unknown, but do not expect them to be cheap: DDR4-4266 modules at this time have only been announced by a few companies, and we believe G.Skill is the first to offer 8 GB modules. Moreover, DDR4-3200 and DDR4-3466 modules with aggressive timings like CL13 or CL14 are also pretty rare.

Availability of memory modules with high clock rates will depend on the availability and binning of chips capable of operating at appropriate frequencies. Typically it is up to the memory companies to find which ICs are capable of these speeds, and companies compete in bidding for certain batches that have high hit rates for fast memory. Nonetheless, if the share of Samsung’s 8 Gb DDR4 chips that can operate in DDR4-4266 mode or with aggressive timings is significant, we may see competing solutions from other companies in the coming weeks or months.

Crucial Announces 16GB Ballistix Sport LT DDR4-2400 SO-DIMMs

Crucial Announces 16GB Ballistix Sport LT DDR4-2400 SO-DIMMs

This week Crucial is introducing its first DDR4 SO-DIMMs for enthusiasts, designed for high-performance notebooks and small form-factor PCs. The Crucial Ballistix Sport LT PC4-19200 SO-DIMMs are available in 4 GB, 8 GB and 16 GB capacities and can operate at DDR4-2400 with 16 16-16 timings with 1.2 volts. The modules feature SPD with XMP 2.0 profiles for devices that support XMP.

PC makers focusing on Intel enthusiast mobile parts usually ship their computers with DDR4-2133 memory modules, as per the JEDEC standard and the supported standard on the chips, and provides a peak 34.1 GB/s bandwidth when operating in dual-channel mode. By contrast, a pair of DDR4-2400 SO-DIMMs enables 38.4 GB/s of bandwidth, or 12.6% higher, which could provide a noteworthy performance improvement in applications that demand memory bandwidth (e.g., graphics applications). At the same time, the binned 2400 MT/s data rate and 1.2 volts modules with additional heatsinks are geared to maintain temperature equilibrium similar to the base frequency modules. In short, it should be relatively safe to use such modules even in highly-integrated systems with moderate cooling.

Crucial Ballistix Sport LT DDR4 SODIMMs and Kits
Density Speed
Latency
Part Number Price Price per GB
4 GB DDR4-2400
16-16-16
1.2 V
BLS4G4S240FSD $21.99 $5.4975
8 GB BLS8G4S240FSD $39.99 $4.9988
16 GB BLS16G4S240FSD $89.99 $5.6244
8 GB (2×4 GB) BLS2K4G4S240FSD $43.99 $5.4988
16 GB (2×8 GB) BLS2K8G4S240FSD $79.99 $4.9994
32 GB (2×16 GB) BLS2K16G4S240FSD $179.99 $5.6247

The prices of the dual module kits are slightly above buying two single modules, but that’s for good reason: users who want more than one module and want guaranteed system compatibility between modules should buy a complete kit. This is because tertiary sub-timings on a multi-module kit are adjusted to compensate for having more than one module (or rather, a kit with fewer modules has tighter timings as it doesn’t have as many modules to compensate for). When a user buys individual modules (or a couple of two-module kits rather than a four-module kit), there’s no guarantee the memory will work together. Many users might not have issues putting modules together because there’s enough wiggle room in the memory controller or the ICs to compensate, but plenty of problems can arise from this, especially when moving to faster speed kits. AnandTech has historically always recommended buying a full multi-module kit with the required capacity in one go, over buying separate modules/mini-kits over time.

The Ballistix Sport LT DDR4 SO-DIMMs will be available for purchase globally from retailers shortly and are currently available from the Crucial website. The modules are backed by a limited lifetime warranty (except Germany, where the warranty is valid for 10 years from the date of purchase). 

G.Skill Unveils New Trident Z DDR4: Five New Colors

G.Skill Unveils New Trident Z DDR4: Five New Colors

G.Skill has introduced new additions to its Trident Z family of DDR4 memory modules, which are designed to simplify the lives of anyone who wants to color-coordinate their PC. The new Trident Z lineup includes memory sticks with five new color schemes…

Price Check: Price Gap Between DDR3 and DDR4 Memory Almost Gone

Price Check: Price Gap Between DDR3 and DDR4 Memory Almost Gone

Around a year ago DRAM manufacturers ended up pinning a lot of their hopes on DDR4 as a way to improve their profit margins. In the cutthroat and highly cyclical DRAM industry, the launch of DDR4-capable systems was seen as encouraging new sales while also serving as an opportunity to sell DRAM with higher margins, owing to the at the time substantial price premium over DDR3. Today however, the difference between prices of DDR3 and DDR4 memory is almost negligible and soon it will likely disappear entirely. What is even more important is that DRAM in general is getting cheaper, which is good for the end-user, but is not necessarily good for companies like Micron, Samsung and SK Hynix.

Prices of DRAM Memory Chips Are Down Again

The average price of one 4 Gb DDR4-2133 memory chip was $1.814 on Taiwanese spot market in late-February, according to DRAMeXchange, one of the world’s leading DRAM and NAND market trackers. This month was the first time when the spot price of one 4Gb DDR4 memory IC dropped below $2. In late December, 2015, a DDR4-2133 chip was priced at $2.221, while in late June, 2015, a similar IC cost $3.618. Overall, one DDR4-2133 chip became 18.4% cheaper in about two months and lost nearly 50% of its price in about eight months. Meanwhile the contract price of one 4 Gb DDR4 chip was $1.63 in the second half of January.

Spot prices of DDR3 memory are also dropping. One 4 Gb DDR3-1600 chip currently costs $1.807 in Taiwan, down from $1.878 in December and $2.658 in late June, 2015. It is clear that the price of DDR3 memory ICs is decreasing slower than the price of DDR4 DRAMs – leading to the impending DDR3/DDR4 price crossover point – but the trend is obvious: memory is getting cheaper. Contract price of one 4 Gb DDR3 IC was $1.59 in the second half of January.

Low prices of DRAM chips naturally influence the pricing of actual memory modules. The price of one 4 GB DDR4-2133 SO-DIMM dropped to $15.50 in the second half of January (down from $18 in December, 2015), whereas the price of one 4 GB DDR3-1600 SO-DIMM decreased to $15.25 (down from $16.75 in December, 2015).

The gap between prices of 4 Gb DDR4 and DDR3 memory ICs on the spot market is now about 7 U.S. cents, leaving DDR4 just a little more expensive than its predecessor. However, if we look at the contract price of two different 4 Gb chips, we will see that one 4 Gb DDR4 IC is an even narrower, it is only 4 U.S. cents more expensive than one 4 Gb DDR3 device. Moreover, contract prices of actual DDR4 and DDR3 4 GB DIMMs, which are used today by a lot of PC makers, are nearly the same (DDR4 is about 1.63% higher, but that is insignificant).

Retail Prices of DDR4 Modules Continue to Decline

It is evident that despite Chinese New Year, a holiday that traditionally drives prices of computer hardware a little bit up because of increased demand and paused production in China, prices of DDR4 DRAM chips and modules are still falling. Let’s take a look how that affects actual retail prices of various DDR4 and DDR3 kits in the U.S.

We’ll start things off with Kingston’s HyperX Fury Black DDR4-2133/CL14 2×8 GB kit (HX421C14FBK2/16), a pretty typical enthusiast-class memory module set. Such modules are used by both DIYers and system integrators, hence, their prices give us a good idea about where the market is going. Right now, Kingston’s kit runs for $69.94 from Amazon, according to CamelCamelCamel, which tracks prices of various items at Amazon and its partners. Just about two months ago the same DDR4-2133 HyperX Fury Black 2x8GB kit was priced at $108.99, which means that it has become 33.9% cheaper in a relatively short period of time.

Since many people these days can build relatively affordable Haswell or Skylake-based PCs, it makes sense to see how much entry-level DDR3L modules cost. Kingston introduced its HyperX Fury Low Voltage 16 GB (2*8 GB) kit (HX318LC11FBK2/16) rated to run at DDR3-1866 frequency with CL11 latency back in October at MSRP of around $96. Today, this kit costs $83.09 at Amazon.

If you are willing to take some risk and use DDR3 instead of DDR3L with Skylake, there is Kingston’s HyperX Fury Black 2×8 GB DDR3-1866/CL10 kit (HX318C10FBK2/16) available for $68.58, down from around $80 in December, 2015. Kingston also offers HyperX Savage Red 2×8 GB kit (HX321C11SRK2/16) that works in DDR3-2133 mode with faster CL11 12-12 sub-timings. The kit is available for $94.29 at Amazon and its price has not significantly changed in roughly the last half-year.

Meanwhile G.Skill’s enthusiast-class Ripjaws V DDR4-3200/CL16 2*8 GB kit (F4-3200C16D-16GVK) currently runs for $107.14 from an Amazon partner. The initial price of this Ripjaws V kit in the U.S. was $176.64 when it first hit the market in November, but it quickly dropped to $136.59 in December, knocking 22% off of its price.

At the top-end of the performance spectrum, G.Skill’s blazing-fast TridentZ DDR4-4266/CL19 2*4 GB kit (F4-4266C19D-8GTZ) is available from an Amazon partner for $361.22 not including shipping, which is down from $460 in mid-December, 2015. Despite being a high-priced niche product, even the G.Skill Trident Z DDR-4266 8 GB kit has become around 22% cheaper in a couple of months’ time.

High capacity kits have also come down in price as well, though perhaps by not as much as mainstream kits. The Corsair Dominator Platinum DDR4-2666/CL15 64 GB kit (CMD64GX4M8A2666C15) was among the first 8×8 GB kits from Corsair, and was specifically designed for high-end desktops running Intel Core i7 Haswell-E processors. When it was introduced in early 2015, it cost $1759.99 at Amazon, and ended the year at $679.99. Today, this kit is priced at $539.99, a further 20.5% drop.

In fact, Corsair has quietly introduced a new version of its Dominator Platinum 64 GB DDR4-2666/C15 kit (CMD64GX4M4A2666C15) consisting of 4*16 GB modules in December. The new quad-channel kit for HEDT PCs was initially priced at $631.99, but right now, it can be acquired for $509.99, or 20% below its original December launch price.

It is obvious that retail prices of advanced non-ECC unbuffered DDR4 memory modules are dropping even faster than the prices of actual DDR4 DRAM ICs. In the last several months IC costs have continued to drop and volumes increased, while demand for all compute components in the first quarter is usually pretty low, which gives retailers like Amazon and Newegg as well as manufacturers themselves good incentive to decrease prices of their modules in a bid to keep their sales on decent levels.

What is noteworthy is that DDR3-1866 and entry-level DDR4-2133 memory modules (such as Kingston HyperX Fury) today have almost reached pricing parity. Moreover, DDR3L and higher-end DDR3-2133 kits are more expensive than DDR4-2133 kits. While DDR3 has an advantage of lower latency, it will get considerably harder and more expensive to upgrade such platforms in the future after DRAM makers reduce production of previous-generation memory.

DDR4 on Track to Become Dominant PC Memory Standard

The miniscule difference between DDR3 and DDR4 pricing indicates that supply of the latter is ramping up and is getting on par with the former. Meanwhile, due to slow demand for PCs in general and continuing shipments of PCs featuring previous-generation CPUs, demand for DDR4 is lower than supply. Nonetheless, since DDR4 is very affordable already, PC makers will gradually shift to the new type of DRAM. As a result, just as expected by companies like IHS and Intel, DDR4 should become the dominant PC memory standard in about a year from now.

Which is not to say that DDR3 will disappear overnight. Intel’s latest Skylake platforms for desktops and notebooks support DDR4, DDR3L and LPDDR3 memory (except Core M, which only support DDR3L and LPDDR3), hence, PC makers can choose which type to install based on their requirements and prices. The vast majority of advanced desktops and high-performance notebooks featuring Skylake CPUs already utilize DDR4 memory. However, a lot of mainstream desktops and notebooks were designed for DDR3 modules because it used to have a considerable price advantage. Even if the price of DDR4 chips drops below that of DDR3 chips in the next couple of months, it will hardly be worth the effort to redesign motherboards of those PCs to accomodate DDR4. Moreover, many Intel’s partners still sell systems based on CPUs featuring Haswell and Broadwell micro-architectures, which only support DDR3. According to analysts from DRAMeXchange, until PC makers clear-out their previous-generation inventory, they will continue to consume a lot of DDR3. As a result, many PCs will continue to feature the previous-gen DRAM for quite a while.

“DDR3 will still account for a large share of the PC DRAM market during the first half of 2016,” said Avril Wu, a research director at DRAMeXchange. “DDR4’s market share will not expand rapidly until the end of the second quarter, when PC OEMs finished clearing their inventories.”

As Intel ramps up shipments of its Skylake processors, more and more PCs will use DDR4. Since Intel’s code-named Kaby Lake processors are rumoured to arrive only in late 2016 or early 2017, we may see a number of mainstream laptops embracing Skylake CPUs and DDR4 memory this year.

Otherwise, from the standpoint of DRAM manufacturers, DDR4 will become the dominant type of PC-class memory already this year in terms of bits shipments. The server industry started its transition to DDR4 in Q4 2014 along with the launch of Intel Xeon Haswell-EP platform. The majority of new x86 server designs nowadays already use DDR4. Servers utilize considerably higher amounts of memory than notebooks or desktops (i.e., they consume a lot more DRAM bits than PCs), so memory makers have to produce more DDR4 memory to satisfy demands of datacenters. IHS and Intel expect crossover in DDR4 and DDR3 production to happen in 2016 and it seems like they are right in their prediction.

DRAM Supply Exceeds Demand

The impending DDR3/DDR4 crossover is being driven by softer DRAM prices overall, which in turn is a product of weaker DRAM demand and growing inventories. Worldwide PC shipments totaled 71.9 million units in the fourth quarter of 2015, a minor 2.7% increase from the third quarter and a 10.6% decline compared to the same period in 2014, according to IDC. Sales of tablets reached 65.9 million units in Q4 2015, an increase of 35.3% sequentially, but a 13.7% drop year-over-year, the researchers claim. Meanwhile, shipments of smartphones hit 399.5 million units in the fourth quarter of 2015 (up 12.4% sequentially and 5.7% YoY), setting a new record.

The vast majority of PCs and many inexpensive tablets use commodity DDR3 or DDR4 DRAM, while smartphones use more expensive LPDDR3 or LPDDR4 memory. Even though shipments of PCs and tablets in Q4 were higher than in Q3, actual DRAM industry revenue dropped by 9.1% quarter-over-quarter to $10.27 billion due to oversupply of commodity DRAM products, market analysts claim. By contrast, LPDDR revenue fell by only 1% to $4.499 billion in the fourth quarter compared to the previous quarter, according to DRAMeXchange.

Part of this drop in demands is of course seasonal, as sales of electronics are typically down in the first half of the year. For example, shipments of notebooks are expected to decline by 20% sequentially, whereas shipments of smartphones are projected to drop by around 16% quarter-over-quarter in Q1 2016. As a result, demand for DRAM is expected to be weak, which is why DRAM prices will remain under pressure. This in turn why we’re seeing actual retail prices of memory modules decline faster than the spot/contract prices of DRAM ICs.

“We expect notebook shipments to have a quarterly decline of 20% in the first quarter of 2016 on account of seasonality,” said Mr. Wu. “Therefore, DRAM manufacturers are under pressure to lower contract prices in order to digest inventory.”

Transition to Newer Fabrication Processes Pushes DRAM Prices to New Lows

There are only three major DRAM manufacturers on the planet, but the competition between them remains tough. Nobody wants to cut-down DRAM production because nobody wants to lose market share. Moreover, Samsung, SK Hynix and Micron are aggressively adopting smaller manufacturing technologies to cut down costs. As fabrication processes shrink, so do the sizes of memory cells, increasing bit output per wafer and essentially boosting DRAM output and causing prices to decline further.

Samsung began to transit its DRAM production to 20 nm fabrication technology in Q1 2014 and analysts from DRAMeXchange believe that by now their yields are very high. Meanwhile market observers anticipate Samsung will start producing memory using their 18 nm manufacturing process sometimes in the middle of 2016, which will further increase the total capacity of DRAM on the market. Smartphone manufacturers are already preparing for the jump, and DRAMeXchange claims that Xiaomi, OPPO and Vivo have already qualified Samsung’s 12Gb mono-die LPDDR4 ICs made using 18 nm technology.

Opposing Samsung, SK Hynix is gradually increasing their DRAM production using their 21 nm manufacturing technology. While the company’s plans concerning smaller processes are unclear, SK Hynix is ramping up its M14 fab (which was completed in August, 2015), which will eventually have a capacity of 200 thousand wafer starts per month. Even without introducing a new process technology, SK Hynix is increasing output of DRAM by deploying the fab. Moreover, the company has not yet started high volume production of monolithic 8 Gb DDR4 ICs on their 21nm process. Once the company kicks off mass production of such chips, their bit output will increase further and will add pressure on prices.

Finally, Micron started to produce memory chips using their 20 nm fabrication process in early 2015. Late last year the company said that they remained on-track with their conversion plan and yield targets for their 20 nm technology. In fact, according to a slide that Micron demonstrated at its Winter Analyst Conference this month, their 20 nm yields are better than their existing 25 nm yields. The Boise, Idaho-based company hopes that half of their DRAM bit output will be produced at 20nm by mid-2016. The DRAM maker also plans to increase production of high-margin memory products, including 8 Gb DDR4, 8 Gb GDDR5/GDDR5X, and LPDDR4. Micron has also publicized aggressive plans for their 16 nm manufacturing technology. The company’s fabs will be ready to start production of 16nm DRAM by September, which will further increase output provided that yield rate will be high enough.

Otherwise, as prices of commodity 4 Gb DRAM chips are declining, makers of computer memory are now pinning their hopes on LPDDR ICs, server DRAM, and graphics/specialty memory as major profit drivers. Usage of 8 Gb DRAM ICs is also growing in servers and client PCs, so there are opportunities for memory makers to earn money in the short term, however 8 Gb chips will also commoditize over time.

Samsung Remains Top DRAM Manufacturer

Thanks to its aggressive transitions to leading-edge process technologies as well as vast manufacturing capacities, Samsung has been the world’s largest DRAM manufacturer for well over a decade. It is not surprising that the company retained its leading position in Q4 2015.

Samsung’s DRAM revenue for the fourth quarter dropped to $4.762 billion, or by 9.7% sequentially, according to DRAMeXchange. The company commanded 46.4% of the global memory market and is considerably ahead of the world’s second largest DRAM maker, SK Hynix. DRAM sales of the latter declined by 9.3% quarter-over-quarter to $2.865 billion, whereas its market share remained nearly flat at 27.9%. Third place Micron’s DRAM shipments deteriorated by 10.5% and totaled $1.945 billion in Q4 2015. The company’s market revenue share also decreased to 18.9%, the analysts found. By contrast, smaller memory makers (Nanya, Powerchip and Winbond), who controlled 3.7% of DRAM market share in the fourth quarter, managed to slightly increase their shipments and share mostly thanks to specialty and industrial memory.

Samsung also shipped the lion’s share of mobile DRAM in the fourth quarter. The company’s LPDDR revenue totaled $2.619 billion, up 1.3% sequentially. Samsung in turn supplies mobile DRAM to Apple; its own mobile division, the world’s top maker of handsets; as well as rapidly growing suppliers from China.

SK Hynix remained the distant second largest manufacturer of mobile DRAM in the fourth quarter of 2015. The company’s sales of LPDDR fell to $1.175 billion from the previous quarter, whereas its revenue share dropped to 26.1%. SK Hynix is another key supplier of LPDDR4 to Apple, which is why its shipments are still very high. Finally, Micron’s mobile DRAM sales declined by 7.7% in Q4 to $642 million, its market share shrank to 14.3%, according to analysts.

Overall, DRAMeXchange expects LPDDR4 to account for 45% of mobile DRAM shipments this year, up from 18.2% in 2015. Meanwhile usage of 8 Gb DDR4 chips is also expected to increase, and if Samsung manages to kick off 18nm DRAM production in mid-2016, as analysts expect, it may again benefit from the capacity and power advantages of a leading-edge manufacturing process. Micron, in contrast, will only be ready with its 16 nm production technology in Q4 2016, so they won’t be able to capitalize on the new process until late in the year.

Micron Reports on GDDR5X Dev Progress - Volume Production This Summer

Micron Reports on GDDR5X Dev Progress – Volume Production This Summer

Engineers from Micron Development Center in Munich (also known as Graphics DRAM Design Center) are well known around the industry for their contribution to development of multiple graphics memory standards, including GDDR4 and GDDR5. The engineers from MDC also played a key role in development of GDDR5X memory, which is expected to be used on some of the upcoming video cards. Micron disclosed the first details about GDDR5X in September last year, publicizing the existance of the standard ahead of later JEDEC ratification and offering a brief summary of what to expect. Since then the company has been quiet on their progress with GDDR5X, but in a new blog post they have published this week, the company is touting their results with their first samples and offering an outline of when they expect to go into volume production.

The GDDR5X standard, as you might recall, is largely based on the GDDR5 technology, but it features three important improvements: considerably higher data-rates (up to 14 Gbps per pin or potentially even higher), substantially higher-capacities (up to 16 Gb), and improved energy-efficiency (bandwidth per watt) thanks to 1.35V supply and I/O voltages. To increase performance, the GDDR5X technology uses its new quad data rate (QDR) data signaling technology to increase the amount of data transferred, in turn allowing it to use a wider 16n prefetch architecture, which enables up to 512 bit (64 Bytes) per array read or write access. Consequently, GDDR5X promises to double the performance of GDDR5 while consuming similar amounts of power, which is a very ambitious goal.

In their blog post, Micron is reporting that they already have their first samples back from their fab – this being earlier than expected – with these samples operating at data-rates higher than 13 Gbps in the lab. At present, the company is in the middle of testing its GDDR5X production line and will be sending samples to its partners this spring.

Thanks to reduction of Vdd/Vddq by 10% as well as new features, such as per-bank self refresh, hibernate self refresh, partial array self refresh and other, Micron’s 13 Gbps GDDR5X chips do not consume more energy than GDDR5 ICs (integrated circuits) — 2–2.5W per component (i.e., 10–30W per graphics card), just like the company promised several weeks ago. Since not all applications need maximum bandwidth, in certain cases usage of GDDR5X instead of its predecessor will help to reduce power consumption.

GDDR5X memory chips will come in new packages, which will be slightly smaller (14×10mm vs. 14×12mm) compared to GDDR5 ICs despite the increase of their ball count (190-ball BGA vs. 170-ball BGA). According to Micron, denser ball placement, reduced ball diameter (0.4mm vs. 0.47mm) and smaller ball pitch (0.65mm vs. 0.8mm) make PCB traces slightly shorter, which should ultimately improve electrical performance and system signal integrity. Keeping in mind higher data-rates of GDDR5X’s interface, improved signal integrity is just what the doctor ordered. The GDDR5X package maintains the same 1.1mm height as the predecessor.

Micron is using its 20 nm memory manufacturing process to make the first-generation 8 Gb GDDR5X chips. The company has been using the technology to make commercial DRAM products for several quarters now. As the company refines its fabrication process and design of the ICs, their yields and data-rate potential will increase. Micron remains optimistic about hitting 16 Gbps data-rates with its GDDR5X chips eventually, but does not disclose when it expects that to happen.

All of that said, at this time the company has not yet figured out its GDDR5X product lineup, and nobody knows for sure whether commercial chips will hit 14 Gbps this year with the first-generation GDDR5X controllers. Typically, early adopters of new memory technologies tend to be rather conservative. For example, AMD’s Radeon HD 4870 (the world’s first video card to use GDDR5) was equipped with 512 MB of memory featuring 3.6 Gbps data-rate, whereas Qimonda (the company which established Micron’s Graphics DRAM Design Center) offered chips with 4.5 Gbps data-rate at the time.

The first-gen GDDR5X memory chips from Micron have 8 Gb capacity, hence, they will cost more than 4 Gb chips used on graphics cards today. Moreover, due to increased pin-count, implementation cost of GDDR5X could be a little higher compared to that of GDDR5 (i.e., PCBs will get more complex and more expensive). That said, we don’t expect to see GDDR5X showing up in value cards right away, as this is a high-performance technology and will have a roll-out similar to GDDR5. At the higher-end however, a video card featuring a 256-bit memory bus would be able to boast with 8 GB of memory and 352 GB/s of bandwidth.

Finally, Micron has also announced in their blog post that they intend to commence high-volume production of GDDR5X chips in mid-2016, or sometime in the summer. It is unknown precisely when the first graphics cards featuring the new type of memory are set to hit the market, but given the timing it looks like this will happen in 2016.