Originally posted by: evolucion8
By Bit-tech.net
http://www.bit-tech.net/hardwa...i_radeon_hd_2900_xt/22
First off, the card is obviously late. Very late. And normally when you?re late, you have to do something special. Unfortunately for AMD,
R600 just isn?t that special because not only is Nvidia?s performance crown still intact, the card AMD has chosen to attack ? the GeForce 8800 GTS 640MB ? has come away with all but a few chinks in its armour.
By Guru3d.com
http://www.guru3d.com/article/Videocards/431/26/
It is what it is, and the HD 2900 XT performance wise ended up in the lower to mid part of the high-end segment.
Sometimes it has a hard time keeping up with a 320MB 8800 GTS, and in other scenarios we see performance close or equal to the GeForce 8800 GTX. Now that would be weird if we all had to pay 600 USD/EUR for it. AMD knows this, and knows it very well. This is why, and honestly this is fantastic, the product is launched at a 399 MSRP. Now I have been talking with a lot of board partners already and here in Europe the product will launch at 350 EUR; and that's just golden.
So we need to leave the uber-power-frag-meister-performance idea behind us and mentally position the product where it is and compare it with the money you have to pay for it. For your mental picture; performance wise I'd say GeForce 8800 GTS 640 MB is a good comparative product (performance wise). Then the opinion will change as you'll receive absolutely a lot of bang for your bucks here. At 350 EUR you'll have a good performing DirectX 10 compatible product, new programmable tessellation unit. It comes with 512 megs of memory. It comes with a state of the art memory controller, offers HDCP straight out of the box, all cards have HDMI connectivity with support for sound and if that alone is not enough, you receive a Valve game-bundle with some very hip titles in there for free. So yeah, you really can't go wrong there.
Beyond3d.com
http://www.beyond3d.com/content/reviews/16/16
With a harder-to-compile-for shader core (although one with monstrous floating point peak figures), less per-clock sampler ability for almost all formats and channel widths, and a potential performance bottleneck with the current ROP setup, R600 has heavy competition in HD 2900 XT form. AMD pitch the SKU not at (or higher than) the GeForce 8800 GTX as many would have hoped, but at the $399 (and that's being generous at the time of writing) GeForce 8800 GTS 640MiB. And that wasn't on purpose, we reckon. If you asked ATI a year ago what they were aiming for with R600, the answer was a simple domination over NVIDIA at the high end, as always.
While we take it slow with our analysis -- and it's one where we've yet to heavily visit real world game scenarios, DX10 and GPGPU performance, video acceleration performance and quality, and the cooler side facets like the HDMI solution -- the Beyond3D crystal ball doesn't predict the domination that ATI will have done a year or more ago. Early word from colleagues at HEXUS, The Tech Report and Hardware.fr in that respect is one of mixed early
performance that's 8800 GTS-esque or thereabouts overall, but also sometimes less than Radeon X1950 XTX in places. Our own early figures there show promise for AMD's new graphics baby, but not everywhere.
Tech Report
http://www.techreport.com/revi...d-2900xt/index.x?pg=16
Ultimately, though, we can't overlook the fact that AMD built a GPU with 700M transistors that has 320 stream processor ALUs and a 512-bit memory interface, yet it just matches or slightly exceeds the real-world performance of the GeForce 8800 GTS. The GTS is an Nvidia G80 with 25% of its shader core disabled and only 60% of the memory bandwidth of the Radeon HD 2900 XT.
That's gotta be a little embarrassing. At the same time, the Radeon HD 2900 XT draws quite a bit more power under load than the full-on GeForce 8800 GTX, and it needs a relatively noisy cooler to keep it in check. If you ask folks at AMD why they didn't aim for the performance crown with a faster version of the R600, they won't say it outright, but they will hint that leakage with this GPU on TSMC's 80HS fab process was a problem. All of the telltale signs are certainly there.