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AMD's ATI Radeon HD 2600 features 120 stream processors

AMD’s next-generation graphics products are right around the corner. The next generation ATI Radeon HD 2000-series includes a top to bottom DirectX 10 lineup consisting of the HD2900, HD2600 and HD2400-series. Although DailyTech unveiled benchmarks of AMD’s upcoming ATI Radeon HD 2900 XT last week, details of the mainstream and value HD 2600 and HD2400-series have remained scarce.

AMD’s next-generation ATI Radeon HD 2600, based on the RV630 core, features 120 stream processing units with three SIMDs and two texture units. There will be two ATI Radeon HD 2600 GPUs: a Pro and XT model with different clock speeds and memory requirements.

AMD and add-in board partners will offer a variety of ATI Radeon HD 2600-based graphics cards. The different models include variations with GDDR4, GDDR3 and DDR2 memory in 512MB or 256MB configurations with or without video input and output capabilities.

Catering towards value users is the ATI Radeon HD 2400 with its 40 stream processors. Two SIMDs and one texture unit join the 40 stream processors. AMD plans to offer the ATI Radeon HD 2400 in Pro and LE models with varying configurations. ATI Radeon HD 2400-based graphics cards will have 256MB or 128MB of video memory. Add-in board manufacturers are free to set the output configuration, including VGA, dual-link DVI, video input/output, HDMI and DMS-59 outputs on ATI Radeon HD 2400-based graphics cards.

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RE: 128-bit Memory Interface?
By defter on 5/7/2007 5:40:47 AM , Rating: 1
Why do you think that 128bit bus chokes 8600 series? For example 8600 GTS has roughly the same bandwidth/ROP ratio as mid range 7900 cards. Increasing bandwidth alone would not significantly increase performance.

RE: 128-bit Memory Interface?
By brites on 5/7/2007 6:31:38 AM , Rating: 2
Really... I belive by the numbers that a 128 Bus does constrain MTR... the 7900 series have a MTR of 42.2Gb/s to 51.2 Gb/S as 8600 series have a MTR of 22.4 to 32 Gb/s... this is 1/2 ot MTR and that is why the 7900 is a better card than 8600 (not looking at the lack of H. and DX10)...

RE: 128-bit Memory Interface?
By defter on 5/7/2007 7:19:30 AM , Rating: 2
For example:

8600 GTS:
8 ROPs @ 675MHz => 5400
32GB/s of bandwidth => bandwidth/ROP ratio is about: 5.93

7900 GT:
16 ROPs @ 450MHz => 7200
42.2GB/s of bandwidth => bandwidth/ROP ratio is about: 5.86

Thus, relatively speaking, 8600GTS actually has slightly more bandwidth compared to fillrate...

7900 series is faster especially at higher resolutions with FSAA/AF because it has more of both: fillrate AND bandwidth. Bandwidth isn't the only thing that matters.

RE: 128-bit Memory Interface?
By Samus on 5/7/2007 7:51:17 AM , Rating: 1
I agree. Having used a 7900gs and a 8600gts, you'd think the 8600 would be competitive, but it isn't. It feels lag-ier and definitely has a lower AVERAGE frame rate through a Battlefield 2142 map.

It can only be contributed to the memory interface.

RE: 128-bit Memory Interface?
By brites on 5/8/2007 5:56:16 AM , Rating: 2
But in the end maths doesn't mather because the 8600gts doesn't win against the 7900gs, not even OC!!! so what really matters is the beenchmarks on games not the 3Dmarks that sometimes doesn't show the real power of the "beast"...

RE: 128-bit Memory Interface?
By brites on 5/8/2007 6:03:49 AM , Rating: 2
Just to end this topic (on my part) I would like to see a 256 bit 8600gts vs a 128 bit 8600gts just to check the diference... and that would be a diference...

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