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[El Reg]Hey coders – get a sense of hUMA: AMD to free GPU from CPU slavery - Page 4

post #31 of 38
what does NV have to lose from getting onboard with this? then again their pride won't allow it.
post #32 of 38
AMD fusion: cpu + lowend gpu
huma: discrete gpu + cpu thumb.gif
Think different wink.gif
post #33 of 38
I like how some people take it personally, assuming companies are like people. They have no feelings, they do what is profitable, what you often think is "pride" is purely a marketing decision for company branding promotion.

Not only NVIDIA have this in mind, their 20nm GPU has an actual general purpose processor built-in (it will be out in 2014, maybe even in the first half, though unlikely to be too early).
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post #34 of 38
Quote:
Originally Posted by DampMonkey View Post

Im guessing shared memory pools will come next, like the 8gb of GDDR5 in the PS4. But i guess APU's already kinda do that, amiright?

This is prohibitively expensive for high-end graphics.

I need 32GiB+ to do what I need to do with my system memory, and my combined total VRAM + system memory bandwidth is about 650GiB/s. Getting more memory than this, that is fifteen times as fast as current system memory standards, all while remaining affordable, is a long ways off.
Quote:
Originally Posted by DampMonkey View Post

If the GPU was interfaced directly with the Northbridge, thus eliminating the southbridge, then system memory tripled in speed, i think things would get interesting!

Most modern chipsets are nothing but glorified southbridges. Northbridges are generally integrated now, and there is no room on a CPU for a high-end GPU, nor would there be an efficient way to cool such a monstrosity.

And system memory would need to do way more than triple.
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post #35 of 38
Quote:
Originally Posted by fateswarm View Post

I like how some people take it personally, assuming companies are like people. They have no feelings, they do what is profitable, what you often think is "pride" is purely a marketing decision for company branding promotion.

While I agree, I feel like Nvidia are one company that are the opposite of this. They are genuine a**holes, though they make excellent GPUs
post #36 of 38
Quote:
Originally Posted by Blameless View Post


Most modern chipsets are nothing but glorified southbridges. Northbridges are generally integrated now, and there is no room on a CPU for a high-end GPU, nor would there be an efficient way to cool such a monstrosity.

And system memory would need to do way more than triple.

I dunno... We have 140w server parts that bolt two 4-module units together into one large die, and we have a 65w part with 2 PD Modules (3.7Ghz) and 384 (VLIW4) shaders.

Kaveri is predicted to be 2-module and 512 (GCN) shaders.

Is a 4-module and 1024 shader version with Quad channel at 140w TDP really asking that much? It'd have to be a new socket, but that could easily be the "Enthusiast" chip. And if you want more thermal headroom for overclocking with real GPUs, you could always disable the iGPU.

And this is before even taking into consideration GCN 2.0 (7790, 290X, 290) that increased GFLOPs/watt by around 40%, which is a huuuuge boon for APUs in general.

They could do it. It wouldn't even be that bad, you'd just need nearly a 212 EVO to cool the thing.

I'm sad that such a thing probably won't exist, because it would be awesome. Probably have to wait for DDR4 before we could have one. frown.gif
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post #37 of 38
On the plus side, AMD seems to be making good efforts to get the low-level stuff sorted, whether it be via Mantle or hQ or huma. If we're lucky they'll even manage to organise a change in their motherboards that'll boost performance/remove bottlenecks, though it'd have to be a major improvement to get OEMs on board.

I don't see why Intel wouldn't welcome a change that made CPU limitations more obvious - it'd just increase the value of their processors for gaming, right?
post #38 of 38
Quote:
Originally Posted by Blameless View Post

Most modern chipsets are nothing but glorified southbridges. Northbridges are generally integrated now, and there is no room on a CPU for a high-end GPU, nor would there be an efficient way to cool such a monstrosity.

And system memory would need to do way more than triple.

My 7790 at 1075MHz core (1926 GFLOPS) consumes about 45-60 watts max average at 1080p (GPUz), temp never goes above 65c even in summer.
This is 2080 Million Transistors on 160mm^2 die, this is exactly 13 Million transistors per mm^2.
290x has even shrunk to about 14.38 MT / mm^2.
APU A10 6800K has 246mm^2 with only 1303 MT.

Assume they again take 246mm^2 and 50% area for iGPU only and with the transistors density same as 290x, they could easily fit about 2000 MT. Transistors for CPUs are not included now. (I know cache will reserve some space though) But this is possible on 28nm only, with HDL.
And the future with 20nm or 14nm........................... drool.gif

Look we are mainly not talking about playing video games here with Hq, hUMA or HSA technology. So what you're saying about fitting High end GPU like 7870 or 7950 doesn't mean here. Its about high amount of enough GPU power for further fasten GPGPU computing. And if proper implementation of HSA becomes true I am afraid that it could surpass any overclocked i7 available today.
One thing I am sure overall APU (CPU+GPU) performance is rising at much higher rate than any CPU.
And I know overclocking such chip might be difficult becoz of temp, but that seems okay for first series of HSA chips.
Ok most of it was my opinion as well, but transistor density is indeed the fact.
Edited by sumitlian - 10/23/13 at 4:35am
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