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[TR] Samsung teases higher-than-expected speeds from its GDDR6 RAM

post #1 of 27
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Quote:
Our inboxes are filling up with news of CES' various Innovation Award winners, but it's rare that something truly newsworthy gets highlighted in those messages. Samsung's slate of award-winning products includes at least one point of interest, though. The company bagged an award for its 16 GT/s GDDR6 graphics memory, so it revealed some interesting details of the progress on that product. Samsung says its GDDR6 RAM is already hitting 16 GT/s (presumably per pin), and presuming GDDR6 maintains the 32-bit-wide data interface per chip of GDDR5, that squares with Samsung's claim of 64 GB/s transfer rates per chip.

Source.

HBM2 can wait some more.
 
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post #2 of 27
But there's supposedly HBM3 with 64GB of 2TB/s bandwidth.
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post #3 of 27
Thread Starter 
Quote:
Originally Posted by czin125 View Post

But there's supposedly HBM3 with 64GB of 2TB/s bandwidth.

Between supposedly and real availability at affordable prices goes a long way. GDDR6 will be on the market early next year, and that's what high-end desktop GPUs will be using, not HBM3. And HBM2 will probably remain a Vega exclusive for a long time.
 
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post #4 of 27
Interesting news. Whats the average speed of L1, 2 and 3 cache on CPU's these days? How big is the gap. Obviously cache still hold the latency superiority, but i think it will be interesting should the speeds get closer together.

HBM will always have its place, especially for it size and packaging.
   
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post #5 of 27
Thread Starter 
Quote:
Originally Posted by SystemTech View Post

Interesting news. Whats the average speed of L1, 2 and 3 cache on CPU's these days? How big is the gap. Obviously cache still hold the latency superiority, but i think it will be interesting should the speeds get closer together.

HBM will always have its place, especially for it size and packaging.

Here is some food for thought on that matter:



http://techreport.com/review/31366/amd-ryzen-7-1800x-ryzen-7-1700x-and-ryzen-7-1700-cpus-reviewed/4
 
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post #6 of 27
Quote:
Originally Posted by SystemTech View Post

Interesting news. Whats the average speed of L1, 2 and 3 cache on CPU's these days? How big is the gap. Obviously cache still hold the latency superiority, but i think it will be interesting should the speeds get closer together.

HBM will always have its place, especially for it size and packaging.

As you noted, DRAM just can't compete with SRAM on latency. For first level caches on CPUs, latency is more critical than size so long as it is "large enough". Even if DRAM had somewhat higher bandwidth, the SRAM option would be the more desirable choice.
post #7 of 27
interesting, 128bit @ 16GT/s makes for a 256GB/s bandwidth, and thats 4dies of GDDR6.
theoretically this means they can make a Polaris-tier card using only 4dies of VRAM, much more compact.
post #8 of 27
Quote:
Originally Posted by tpi2007 View Post

Between supposedly and real availability at affordable prices goes a long way. GDDR6 will be on the market early next year, and that's what high-end desktop GPUs will be using, not HBM3. And HBM2 will probably remain a Vega exclusive for a long time.

HBM2 is already not a Vega exclusive technology. Nvidia uses it in its P100-series of cards. They just cost 6-10k dollars each. I also think we'll see HBM2 on some APUs soon enough. Even just 1 4GB stack would make onboard graphics amazing for what they are.

I feel HBM will always have its place. It just might not become ubiquitous as fast as some people thought it would be. Right now most of the HBM is being used by the high-end compute cards and the consumer/prosumer level cards are getting the trash chips. That'll change eventually and this new technology will evolve. There will be a tipping point but it may not be anytime soon.
post #9 of 27
Thread Starter 
Quote:
Originally Posted by PearlJammzz View Post

Quote:
Originally Posted by tpi2007 View Post

Between supposedly and real availability at affordable prices goes a long way. GDDR6 will be on the market early next year, and that's what high-end desktop GPUs will be using, not HBM3. And HBM2 will probably remain a Vega exclusive for a long time.

HBM2 is already not a Vega exclusive technology. Nvidia uses it in its P100-series of cards. They just cost 6-10k dollars each. I also think we'll see HBM2 on some APUs soon enough. Even just 1 4GB stack would make onboard graphics amazing for what they are.

I feel HBM will always have its place. It just might not become ubiquitous as fast as some people thought it would be. Right now most of the HBM is being used by the high-end compute cards and the consumer/prosumer level cards are getting the trash chips. That'll change eventually and this new technology will evolve. There will be a tipping point but it may not be anytime soon.

As I said in bold above. And the Intel - Radeon APU uses Vega graphics, so that's accurate too. The tipping point will probably be the generation after this next one, assuming that GDDR6 doesn't scale much past 16 Gbps and if there isn't some kind of GDDR7 that we still don't know about.
Edited by tpi2007 - 11/10/17 at 12:45pm
 
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post #10 of 27
Samsung's low cost HBM is also expected to be around 200 GB/s per stack. Would be more curious to know where things sit cost wise in terms of $/GB.



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