Radeon HD 7000 Revealed: AMD to Mix GCN with VLIW4 & VLIW5 Architectures

[Lanek]

"It should end faster of the 580" . I dont understand why he base his article on that. new architecture, 28nm, new series ...

[kaktus1907]

365mm2 definitely leaves them to release an update later in 28nm

[Lanek]

huum, Cypress was 334mm2... but 365mm2, is a bit too much far of the estimation made..

[tbone8ty]

slide says "embago" lol

[AliG]

Do we have any knowledge of how the GCN shaders will compared to those from the R600 architecture? IE how do 2048 GCN cores compare to 2048 VLIW4 cores (suped up 6970 effectively)

[fellix_bg]

Do we have any knowledge of how the GCN shaders will compared to those from the R600 architecture? IE how do 2048 GCN cores compare to 2048 VLIW4 cores (suped up 6970 effectively)

GCN will have higher efficiency and run-time utilization than VLIW. It will have some sort of limited dynamic scheduling, but nothing exotic like in Fermi. GCN will rely on the sheer amount of in-flight threads/wavefronts to choose from and hide memory access latency and other pipeline stalls, and much less on the compiler.
The VLIW architrecture required some quite laborious compiler work to group instructions into so called "clauses" and offered zero hardware support for any run-time optimizations (instruction scheduling/reordering).

[LordEC911]

I just read that the idle power is advertised at 3W for the HD 7970. Very nice especially for those running multiple cards.

That isn't idle board power.

[kaktus1907]

7900 Series The World's Most Powerful and Advanced Graphics

[Macadamia]

Hah!

Totally faked OBR slides... the one just above is real.
OBR's... wrong font, old visual style and faked specbars (intentionally prolonged to give the impression that AMD were giving super unrealistic numbers)
What a c*nt.

[bill_d]

hmm 1 week ?
http://vr-zone.com/articles/amd-brin...011/14255.html

[AliG]

Looks interesting I guess. TBH I'm more intrigued at the rumors of GK100 having 1024 CUDA Cores; GCN would have to be at least 70% more efficient for AMD to keep up in single gpu setups from my math (I assumed linear performance scaling, and gtx 580 being 10% faster than 6970). I guess that means they always have the 7990 to go against NVidia's high end, but power consumption would be astronomical as would price

[3lfk1ng]

I will wait to see Nvidia vs ATI before making any decisions. There are so many architecture changes happening with this new generation of videocards (from both companies) that I just want to see why those changes are being made. Overall I'm just excited for the 28nm revolution.

[AliG]

Agreed on the 28nm. I've held off on a gpu upgrade for a long time now purely because I didn't want a 40nm product. With that being said, doing the math you can see that GCN would have to be drastically more efficient than VLIW to compete with GK100. From everything we've heard, it seems that the majority of changes were done with the workstation market in mind (impyling that I don't think we'll see this round go to AMD).

[FischOderAal]

7900 Series The World's Most Powerful and Advanced Graphics

I like big bars and I cannot lie ...

I'm interested. Probably will build a new sys soon

Agreed on the 28nm. I've held off on a gpu upgrade for a long time now purely because I didn't want a 40nm product. With that being said, doing the math you can see that GCN would have to be drastically more efficient than VLIW to compete with GK100. From everything we've heard, it seems that the majority of changes were done with the workstation market in mind (impyling that I don't think we'll see this round go to AMD).

IF GK100 will have 1024 CUDA cores. It's all just rumors and we don't know how fast these will be yet.

[Manicdan]

can someone measure the length of the 7970 for us based on the image showing the side of the card and PCIe slot, thanks!

[Pantsu]

Still using a vapour chamber? I thought they were switching to those liquid chambers, or is 6th generation vapour chamber the same thing?

These slides look a bit more legit that the OBR ones, but still I wouldn't look too deep into performance numbers. Nice to see DX11.1 and PCI-e 3.0 supported though.

[paulbagz]

I sure hope those slides are not another round of spin.

I semi lost faith in AMD after all that has gone on with BD.

-PB

[AliG]

IF GK100 will have 1024 CUDA cores. It's all just rumors and we don't know how fast these will be yet.

The trend makes sense though, think about it:

G80 => GT200 => GF110/100 => GK100

128 => 256 (240 usable) => 512 => 1024???

Considering the pattern NV has been following for quite a while now, it wouldn't surprise me if it does have 1024 CUDA cores. Though I do wonder how they could possibly cool something of that monstrosity. Even at 28nm that chip would have to be over 500 mm^2 not to mention consume a butt load of power

[nascasho]

What makes me nervous is that all those games on the last slide use tessellation, If I were marketing something I'd show off what I improved... a lot.

I want something faster than my 480 and I refuse to go dual cards ever again, hope this sucker will be epic. Can't wait for the reviews.

[Manicdan]

What makes me nervous is that all those games on the last slide use tessellation, If I were marketing something I'd show off what I improved... a lot.

I want something faster than my 480 and I refuse to go dual cards ever again, hope this sucker will be epic. Can't wait for the reviews.

agreed, if tessellation games increased 60-250% then games that were not using much tessellation might be only 40-60% faster

[Lanek]

What makes me nervous is that all those games on the last slide use tessellation, If I were marketing something I'd show off what I improved... a lot.

I want something faster than my 480 and I refuse to go dual cards ever again, hope this sucker will be epic. Can't wait for the reviews.

Thoses slides is not complete it miss a lot of pages... this page is for show how the tesselation have increased

[FischOderAal]

The trend makes sense though, think about it:

G80 => GT200 => GF110/100 => GK100

128 => 256 (240 usable) => 512 => 1024???

Considering the pattern NV has been following for quite a while now, it wouldn't surprise me if it does have 1024 CUDA cores. Though I do wonder how they could possibly cool something of that monstrosity. Even at 28nm that chip would have to be over 500 mm^2 not to mention consume a butt load of power

Yes, it makes sense and I wouldn't be surprised either. However seeing the issues NVIDIA had in the past products due to the big DIEs I kinda expect them to opt for different approach this time... But you never know

[iMacmatician]

The trend makes sense though, think about it:

G80 => GT200 => GF110/100 => GK100

128 => 256 (240 usable) => 512 => 1024???

Considering the pattern NV has been following for quite a while now, it wouldn't surprise me if it does have 1024 CUDA cores. Though I do wonder how they could possibly cool something of that monstrosity. Even at 28nm that chip would have to be over 500 mm^2 not to mention consume a butt load of power

The GT200 actually had 240 CCs on the chip… I think.

One thing to note is the GT200 had a shrink from 65 nm to 55 nm, so from G80 to GF100 there have been 2.5 node shrinks.

G80 » GT200 : 90 nm » 65 nm, 484 mm^2 » 576 mm^2 (1.19x), 128 » 240 (1.88x) : 1.58x CCs/mm^2
GT200b » GF100 : 55 nm » 40 nm, 470 mm^2 » 530 mm^2 (1.13x), 240 » 512 (2.13x) : 1.89x CCs/mm^2

And that's not to mention TDPs. So if GF110 » Kepler is anything like the above in terms of CCs/mm^2 increase, I think there would be fewer than 1024 CCs in the top-end Kepler chip unless they pull some magic with the SPs or other stuff or they conjure up a chip close to 600 mm^2. My guess is 640 < CCs ≤ 960.

[nascasho]

Thoses slides is not complete it miss a lot of pages... this page is for show how the tesselation have increased

Thanks for clarifying, I was wondering what that chart meant.

Also, you're right on the slides bunch more to the looks of it on neogaf, but they're too small to read.

[Lanek]

Yes + there's some faked pages who turn around ... modified one from 6970 launch ,so take all this with a lot of precaution ( the last slide look correct )..

http://www.abload.de/image.php?img=slides0vka9.png (note they are completely unreadable )



Is the launch really advanced to the 22?

AMD Brings the Launch of Radeon HD 7900 Series Forward: December 22nd, 2011

Read more: http://vr-zone.com/articles/amd-brin...#ixzz1ge0ZjbQj