Micron Finishes GDDR6 Internal Qualification, Eyes H1'2018 Mass Productionby Ryan Smith on December 21, 2017 6:30 PM EST
With rumors swirling pretty widely that the next generation of video cards from both vendors will be based around GDDR6 memory, there’s understandably a lot of interest in the development and release status for the new memory. While GDDR6 is not set to ship until 2018, 2017 is now just weeks from coming to a close, meaning “later” is quickly becoming “sooner” and vendors are releasing increasing amounts of information about their GDDR6 plans.
No exception to that rule is Micron, who published a blog post this morning recapping their 2017 graphics memory efforts and outlining their production initiatives for 2018. The company already has a foot in the door on the next-generation memory game with GDDR5X, and as previously announced by the company, they’re looking to pivot that experience into producing GDDR6.
Getting to the meat of Micron’s blog post then, the company has revealed today that they have finished the design and internal qualification of their 12Gbps and 14Gbps GDDR6 chips. This means that at least internally, they have completed what’s arguably the hardest parts of GDDR6 development from the memory side of matters, and now they can focus on mass production and the development of even higher speed bins. Interestingly, according to the company they actually came in a bit ahead of schedule here, as they weren’t originally planning to be done with internal qualification quite this soon.
As far as mass production goes then, Micron has previously discussed reaching mass production of GDDR6 in the first half of 2018, and as of their latest update that’s still the goal. In fact the company is already sampling the chips. Notably here, they’ve said that they’re “pushing” for H1 on mass prodcution, but with internal qualification slightly ahead of schedule, it puts them in a better position to hit their goals.
Meanwhile the company’s chip designers are now buckling down to work on the next set of GDDR6 speed bins, including 16Gbps GDDR6. This is an area in particular that the company is looking to leverage their GDDR5X experience, as the biggest challenge at this point is the signaling rather than the memory cells themselves. Successive GDDR standards have generally only made modest changes to the internal clockspeed of the memory cells, while the interface speeds themselves have continued to ratchet up. And while GDDR5X and GDDR6 have some notable differences between them, Micron’s existing experience with 12Gbps+ GDDR5X is generally applicable to GDDR6 as well. However at least for the moment, Micron isn’t talking about when a 16Gbps speed bin may be available since it’s so early into development.
Finally, while GDDR6 will be the new cutting edge graphics memory for 2018, the success of GDDR5 over the past decade means that memory isn’t going anywhere any time soon, and Micron’s blog post notes that the company is continuing to invest in that as well. The company has started mass production and shipping of 8Gb GDDR5 chips built on their new “1Xnm” DRAM manufacturing process, which is part of their long-term plans for continuing GDDR5 production. Even in a best-case scenario, GDDR6 is likely to hold a price premium for quite some time, so GDDR5 is going to be the more reasonably priced memory option for mainstream video cards and other devices that need the higher bandwidth of GDDR memory, but not the speeds (or costs) of GDDR6. The company has also noted that the new DRAM offers “increased speed margins” but hasn’t elaborated on just what that means.
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jjj - Thursday, December 21, 2017 - linkLikely the "increased speed margins" means 8Gb/s for the 8GB GDDR5 die vs 7Gb/s max for the older parts.
jjj - Thursday, December 21, 2017 - linkNm seems they had 8Gb/s already.
menting - Thursday, December 21, 2017 - linkit most likely means that even though they are speed binned for the max speed bin, they can safely run higher than that speed.
Yojimbo - Thursday, December 21, 2017 - linkDuring Micron's earnings release conference call on December 19th, Micron's CEO Sanjay Mehrotra said in a prepared remark, "We sampled industry-leading 16Gb-per-second GDDR6 products to key customers and are seeing significant interest in automotive and networking applications that need the high bandwidth this memory provides. We plan to ramp GDDR6 to production in early calendar 2018 for the graphics market, followed by other high-performance applications such as automotive and networking."
In other words, according to his statement, they are sampling 16 Gb/s GDDR6 even though it's not listed on that web site. Also, the choice of words "We plan to ramp GDDR6 to production in early 2018..." seems a bit stronger to me than "first half 2018". I wouldn't consider May or June early 2018. (Of course, as Tesla shows, different companies have different meanings of the word "production".) So, it looks reasonable that graphics cards based on the next generation architecture could be available by the middle of 2018, even H1 2018.
Pork@III - Friday, December 22, 2017 - linkWhere is speed upgrade? Or just new model number?
Yojimbo - Friday, December 22, 2017 - linkBandwidth must be balanced by power efficiency. If you are willing to pay 150 W for the memory subsystem you can have massive bandwidth. GDDR6 can reach high bandwidths at lower power dissipation than GDDR5. Micron offers GDDR5 up to 8 Gb/s and GDDR5X up to 12 Gb/s. GDDR6 with 16 Gb/s signaling is incoming, apparently with reasonable power usage. So the memory bus doesn't have to be so wide to provide high bandwidths. In fact, it looks like without GDDR6 NVIDIA would have to turn to HBM2 to get enough memory bandwidth at a reasonable power draw for their next generation high-end graphics cards.
Pork@III - Friday, December 22, 2017 - link"GDDR6 with 16 Gb/s signaling is incoming"
Mmm but use twice cnannels per half physically I/O
You must explain to me how this can actually happen in reality, with an increase in bandwidth?
0ldman79 - Saturday, December 23, 2017 - linkThe other side of that is adding in more chips, more channels at the same power envelope.
Eventually GDDR5 is going to be limited by power, GDDR6 will be able to go farther. Evolution, not revolution...
deil - Friday, December 22, 2017 - linkso when I will get ddr5 for CPU ? :) gib
iwod - Friday, December 22, 2017 - linkAs far as we know HBM3 will be based on 7nm, which means it is likely to be late 2018 before we see it.
GDDR6, assuming cost is still inline with GDDR5, sounds like offer a much better price to performance then HBM3.