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Windows 7: HD5870 & HD5870x2 revealed.....

30 Apr 2009   #1

HD5870 & HD5870x2 revealed.....

German site ATI-Forum probably scored a coup of 2009 - according to their sources, ATI's RV870-based cards are already out at selected partners.
We cannot say was this leak was a reaction on our joint-exclusive story about nVidia's GT300 architecture, but one thing is for sure - ATI wants to bring out their Cypress board as soon as possible - planned for July 2009.

The alleged specifications of RV870 reveal that this chip is not exactly a new architecture, but rather a DirectX 11-specification tweak of the RV770 GPU architecture. Just like nVidia's GT300 architecture, the actual RV870 chip is manufactured in TSMC's 40nm half-node process, packing more transistors than GT200 chips. Regardless of what ATI says about nVidia and large dies, the fact of the matter is that ATI is making a large die as well - but the company will continue to use the dual-GPU approach to reach high-end performance.

The RV870 chip should feature 1200 cores, divided into 12 SIMD groups with 100 cores each [20 "5D" units], while RV770 was based on 10 SIMD group with 80 cores total [16 "5D" groups consisting out of one "fat" and four simpler ones]. Thus, it is logical to conclude that when it comes to execution cores, not much happened architecturally - ATI's engineers increased the number of registers and other demanding architectural tasks in order to comply with Shader Model 5.0 and DirectX 11 Compute Shaders. The core is surrounded with 48 texture memory units, meaning ATI is continuing to increase the ROP:Core:TMU. For the first time, ATI is shipping a part with 32 ROP [Rasterizing OPeration] units, meaning the chip is able to output 32 pixels in a single clock.

When it comes to products, ATI plans to launch four parts: Radeon HD 5850 and 5850X2 in more affordable pricing bracket and HD5870 and HD5870X2 for the high-end parts. While there were no clocks for the Radeon HD 5850/5850X2 parts, alleged clocks for HD5870 and HD5870X2 reveal that for the first time, an X2 part is clocked higher than a single-GPU part. Was this a requirement of SidePort memory interface, we are not aware atm. German site Hardware-Infos placed all of the data in a very convenient table, which we are running here with permission. Their story also contains more data about the upcoming ATI RV870 architecture.

ATI 4870 vs 5870 table...courtesy of Hardware-Infos
These units should result in 2.16 TFLOPS for the HD5870 and 4.56 TFLOPS for the dual-GPU part. Yes, you've read correctly - we are going from 1TFLOPS chip to 4.6TFLOPS within 13 months. Is it now clear that CPUs are in a standstill when it comes to performance improvements? The biggest question though is - while there is no doubt that ATI pulled another miracle out of their hat with a brilliant on-time execution, releasing a 40nm part that will be relatively cheap to manufacture. BUT - can it beat nVidia's GT300 and by how much?

Some journalists allegedly have miracle 8-balls and claim that the ATI cards will blow nVidia out of the water. We are not so certain... stay tuned.

those are some crazy stats, if they turn out to be real, though *IIRC* isn't the GT300 supposed to have double the SPs of the current GT200?..... If so, RV870 with only 50% more SPs are going to have a tough fight....

2 TFLOPs per GPU?!?! That would be a great result for folding farms.......


My System SpecsSystem Spec
30 Apr 2009   #2

Windows XP

Can't wait until the entry level 5-series come out .
My System SpecsSystem Spec
30 Apr 2009   #3

Windows 7 Ultimate Vista Ultimate x64

I don't buy ATI, but I'm beginning to like their work, I just hope their drivers are as good as their products.
My System SpecsSystem Spec

30 Apr 2009   #4

Windows XP x64/ Sev7en RC x64

Nice.. i always say, wait the next generation of DX...i have 2 8800 GTS 640 MB, with volt mod on hardware, Zalmam VF1000 + RH3 on mems...and i say...ia get the same performance of GTX260, and, on some games, they like GTX280... i have an Ageia PHYSX on PCI-E SLOT, and find an way to overclock this card... my computer 6320 with 2.1 GHZ FSB, more than much overclockeds E8400....because buy buy buy ???? this is too crazy, and, sped money for nothing...
My System SpecsSystem Spec
30 Apr 2009   #5

Windows 7 Professional, Windows Longhorn 4074

Quote   Quote: Originally Posted by Mr GRiM View Post
I don't buy ATI, but I'm beginning to like their work, I just hope their drivers are as good as their products.
I've heard Catalyst is like the emperor of drivers :)
My System SpecsSystem Spec
01 May 2009   #6

Linux (Debian, Android)

As long as they can double the performance in games from 4800 series to 5800 series, I'll be happy. Like from 3850 -> 4850. So, 5850 needs to be equivalent to a 4850x2, while drawing less power thus needing a smaller PSU and heatsink.

If they use 40 nm and figure out how to lower the idle power consumption on GDDR5 (clock gating) I think they will be able to do this.

AMD have already demonstrated that their chips can scale with clocks (4890 with decap ring) so lets hope they reuse their knowledge in the next architecture :)
My System SpecsSystem Spec
01 May 2009   #7


Quote   Quote: Originally Posted by ikilledkenny View Post
I've heard Catalyst is like the emperor of drivers :)
lol, not much of a kingdom then.

Seriously though, just like nvidia drivers, some games have certain glitches while others are mostly fine and others are simply rock solid.

I've had a few gripes with ATI drivers, but they're far from what you would consider broken.

I'm liking that 5870x2 so far. I'm liking the June release even better. However I don't think I'll be liking the prices
My System SpecsSystem Spec
01 May 2009   #8

Windows 7 Professional, Windows Longhorn 4074

Specs look good on paper, can't wait until it's out.
My System SpecsSystem Spec

 HD5870 & HD5870x2 revealed.....

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