Monday, November 22nd 2010
AMD Cayman, Antilles Specifications Surface
At last, specifications of AMD's elusive Radeon HD 6970 and Radeon HD 6990 graphics accelerators made it to the internet, with slides exposing details such as stream processor count. The Radeon HD 6970 is based on a new 40 nm GPU by AMD, codenamed "Cayman". The dual-GPU accelerator being designed using two Cayman GPUs is codenamed "Antilles", and carries the product name Radeon HD 6990.
Cayman packs 1920 stream processors, spread across 30 SIMD engines, indicating the 4D stream processor architecture, generating single-precision computational power of 3 TFLOPs. It packs 96 TMUs, 128 Z/Stencil ROPs, and 32 color ROPs. Its memory bandwidth of 160 GB/s indicates that it uses a 256-bit wide GDDR5 memory interface. The memory amount, however, seems to have been doubled to 2 GB on the Radeon HD 6970. Antilles uses two of these Cayman GPUs, combined computational power of 6 TFLOPs, a total of 3840 stream processors, total memory bandwidth of 307.2 GB/s, a total of 4 GB of memory, load and idle board power ratings at 300W and 30W, respectively.
Source:
3DCenter Forum
Cayman packs 1920 stream processors, spread across 30 SIMD engines, indicating the 4D stream processor architecture, generating single-precision computational power of 3 TFLOPs. It packs 96 TMUs, 128 Z/Stencil ROPs, and 32 color ROPs. Its memory bandwidth of 160 GB/s indicates that it uses a 256-bit wide GDDR5 memory interface. The memory amount, however, seems to have been doubled to 2 GB on the Radeon HD 6970. Antilles uses two of these Cayman GPUs, combined computational power of 6 TFLOPs, a total of 3840 stream processors, total memory bandwidth of 307.2 GB/s, a total of 4 GB of memory, load and idle board power ratings at 300W and 30W, respectively.
134 Comments on AMD Cayman, Antilles Specifications Surface
6970 would only have 1920 stream processor.
it couldn't beat GTX580.
i hope 6970 would be double of 6870.
this will surely beat GTX580.
i will stick with my 5870 E6.
Considering AMD/ATI is at huge issues with driver, BIOSes and all software of software issues + the fact that they have delay issues and nothing(as in new games) never seems to work correctly on their GPUs it is pretty funny..
(and nobody dare to accuse me an 'NVIDIA' fanboy I own only AMD/ATI GPUs atm a lot of them and I've been fixing their drivers for past 6 months almost every day basis.)
I have never encountered a problem with ATi's graphics card, my old X300 is still happy inside my parent's pc, and my lappy's 4570 has not overheated (unlike my 8400GS). Never had any problems on the driver side either.
Edit: any chance of seeing 6850X2/6870X2? From benchies, it seems that those two cards provide a lot of crossfire power and should cost less than a GTX580 while delivering more performance.
Though there's not much else to add at this point.
more stream processors
more stream processors
and more stream processors = HD 9990
After spending some time using only one of my 6870's to find out it's almost enough to max out most of the games i play at 5040x1050 i think selling my 6870's and getting one 6970 would give me the power to game over 3 monitors and no crossfire worry's :D i look forward to the reviews.
On top of that the TMU number per SIMD is always a power of 2 and has always been 4 so far on AMD cards. 30 SIMDs most probably means 120 TMUs.
Only other posibility is that Cayman is still 5D and has 24 SIMDs. 1920/80 = 24. Then all the numbers provided here match up. (24 x 4 = 96 TMU)
Edit* More slides, and one that conflicts with the one I posted. "TBA" on those specs. www.arabhardware.net/forum/showpost.php?p=1646720&postcount=1523
My 480's regularly use more than 1 GB in games at that res. Hell there is even a few games that use more than 1 GB at 1920 x 1080 with 4/8 x AA.
Overclocking the memory on the 480's does very little as well. Again OC the GPU massive jump in performance in most games.
Maybe you could ask a friend to teach you how to build and maintain a computer properly because its not normal to have so many problems.
AMD doesnt ban people for complaining from the website either unless you were acting like a tool.
soo... your doing something wrong...
obviously since we run 10 000 laptops at work and we've had no complaints about ati cards from any.
ati's rma rate is also EXACTLY the same as nvidia... highest rma cards is 4870X2 and then GTX 295.
But only if cayman have enough bandwidth (512bit memory perhaps)
Let wait for the review and see,
but power consumption look promising, 300W for dual Cayman, that's great:toast:
and support 8 display:rockout:
I really hope the 6970 is about the speed of 6870 crossfire (although only due to imperfect scaling thus 1920 sp's being about the same performance as 2240 in crossfire) but excels anywhere that vram is a limit, If so i will be saying goodbye to my 6870's as i have never been a fan of dual card setups, i just got these because i could not wait any more :laugh: