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[KG/TT] AMD also rumored to be using GDDR5x on new 14nm GPUs (Updated) - Page 2

post #11 of 76
Quote:
Originally Posted by Clocknut View Post

Micron's GDDR5x killed HBM2 adoption rate. biggrin.gif
'
Mmm looks like Micron rained on both Hynix and Samsungs parade eh?

When I think about Fiji, I am getting flashbacks of the HD2900 with its GDDR3 and 512-Bit bus width...and now HBM1 will probably never be used again even for lower end cards, due to GDDR5X being on the scene.
Edited by GHADthc - 10/29/15 at 3:18am
post #12 of 76
Quote:
Originally Posted by Clocknut View Post

Micron's GDDR5x killed HBM2 adoption rate. biggrin.gif
Well, GDDR5 is more widely used, and GDDR5x will only feature minor architectural changes. Of course it will be faster adopted. Its like a refresh version of GDDR5. Plus it will cost just a bit more than GDDR5.
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post #13 of 76
Quote:
Originally Posted by ku4eto View Post

Well, GDDR5 is more widely used, and GDDR5x will only feature minor architectural changes. Of course it will be faster adopted. Its like a refresh version of GDDR5. Plus it will cost just a bit more than GDDR5.
Samsung says hbm is +53% more expensive, tsmc says hbm is 8 times more power efficient(7w & 56w). Hynix says HBM is the way forward power budget wise while differential io is at a lower efficiency grade. I think the end result is, we will hit power threshold issues more frequently with gpu software monitoring on gddr5x.
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post #14 of 76
Quote:
Originally Posted by GHADthc View Post

'
Mmm looks like Micron rained on both Hynix and Samsungs parade eh?

When I think about Fiji, I am getting flashbacks of the HD2900 with its GDDR3 and 512-Bit bus width...and now HBM1 will probably never be used again even for lower end cards, due to GDDR5X being on the scene.
Fury X is kinda the new HD2900, even more so when you compare them against 8800/980ti
post #15 of 76
It makes sense tho. Even Fiji can't seem to take advantage of all that bandwidth, so currently there's not a whole lot of benefit to HBM besides the power savings. HBM is simply not worth the cost unless the products you are using it in have a large profit margin.
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post #16 of 76
Ofc they will. The low/mid end cards will not get HBM, too expensive and pointless anyway.
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post #17 of 76
Quote:
Originally Posted by BinaryDemon View Post

Even Fiji can't seem to take advantage of all that bandwidth, so currently there's not a whole lot of benefit to HBM besides the power savings. HBM is simply not worth the cost unless the products you are using it in have a large profit margin.

Which is why I expect to see it on workstation cards and Tesla long before the next wave of ultra high end gaming cards use it. Neither side needs to bank on memory for the performance race.. both have new architectures on a brand new manufacturing node. I'd even wager only the refresh cards get HBM once the professional market has its fill (and they have sufficient factory rejects to make a new Titan-whatever).

Workstation cards have stagnated more than the gamer cards since Maxwell was terrible for compute. The only "new" thing they released is the tesla K80, which is a dual Kepler solution.
post #18 of 76
Quote:
Originally Posted by GHADthc View Post

'
Mmm looks like Micron rained on both Hynix and Samsungs parade eh?

When I think about Fiji, I am getting flashbacks of the HD2900 with its GDDR3 and 512-Bit bus width...and now HBM1 will probably never be used again even for lower end cards, due to GDDR5X being on the scene.
hey they might even double the data rate again once GDDR5x is getting old. biggrin.gif
Edited by Clocknut - 10/30/15 at 12:57am
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post #19 of 76
Hey look at that. I think I remember certain people bashing Nvidia for this decision. I wonder if those same people will now bash AMD?

Anyway, this makes sense. HBM is going to be expensive for a while and hasn't shown any benefits as of yet to be worth putting on lower end cards and affecting margins.
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post #20 of 76
It makes sense. I'm almost certain that a Fiji GPU costs more than a GM200 GPU to manufacture for a few reasons:

  • While the Fiji die is <1% smaller, it has >10% more transistors, meaning it's likely more complicated to produce
  • HBM is significantly more expensive than GDDR5 - it's completely new tech, vs GDDR5 with its roots in DDR3
  • The silicon interposer to allow 2.5D "stacked" VRAM is a separate die entirely, built on a 65nm process; GM200 does not need this die for obvious reasons


Granted, the interposer has no logic and is more or less a fancy circuit board. That said, Fiji is almost certainly one of the most expensive GPUs to be manufactured in recent years. AMD knows this, if Nvidia doesn't yet they will once Pascal nears launch, and it simply isn't feasible to slap HBM on everything.

Yet.
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