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For every new GPU, ATI and NVIDIA always introduce a number of video cards targeted towards different segments of the market. Currently, the GeForce 7 series is split up into 17 different classes of video cards. However, despite the confusion caused by the many different classes, consumers still benefit in the end. Thanks to the many variants of graphics cards, the pricing of video cards is usually roughly proportional to the performance they offer.
NVIDIA has recently introduced a new video card that is meant to directly compete with the X1900 GT. The card is based on the G71 GPU and is called the GeForce 7900 GS. Video cards based on the G71 usually feature 8 vertex shaders and 24 pixel pipelines. However, the main element of distinction for the GeForce 7900GS is the disabling of 4 pixel pipes and one vertex shader unit.
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ATI Radeon X1800 GTO2 |
ATI Radeon X1800 GTO
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ATI Radeon X850 XT |
NVIDIA GeForce 7900
GS |
NVIDIA GeForce 7600
GT |
NVIDIA GeForce 6800
Ultra |
Memory Bus |
256 bit |
256 bit |
256 bit |
256 bit |
128 bit |
256 bit |
Production Process |
0,09 micron |
0,09 micron |
0.13 micron |
0.09 micron |
0.09 micron |
0.13 micron |
Core/Memory Frequencey |
500/1000 |
500/1000 |
520/1080 |
450/1320 |
560/1400 |
400/1100 |
Bus |
PCI Express 16x |
Vertex Shader Units |
8 |
8 |
6 |
7 |
5 |
6 |
Pixel Shader Units |
16 |
12 |
16 |
20 |
12 |
16 |
Number of TMU |
16 |
12 |
16 |
20 |
12 |
16 |
Number of Rops |
16 |
12 |
16 |
16 |
8 |
16 |
Pixel Rate |
8000 Mpixel |
6000 Mpixel |
8320 Mpixel |
7200 Mpixel |
4480 Mpixel |
6400 Mpixel |
Texel Rate |
8000 Mpixel |
6000 Mpixel |
8320 Mtexel |
9000 Mtexel |
6720 Mtexel |
6400 Mpixel |
Z-Stencil Fill Rate
|
8000 Mpixel |
6000 Mpixel |
8320 Mpixel |
14400 Mpixel |
8960 Mpixel |
12800 Mpixel |
Bandwith |
32 GB |
32 GB |
34,5 GB |
42,2 GB |
22,4 GB |
35,2 GB |
Vertex Shader Version |
3.0 |
3.0 |
2.0 |
3.0 |
3.0 |
3.0 |
Pixel Shader Version |
3.0 |
3.0 |
2.0b |
3.0 |
3.0 |
3.0 |
Full Scene Anti-Aliasing |
Adaptive AA and Multisampling |
Adaptive AA and Multisampling |
Smoothvision HD |
Intellisample 4.0 |
Intellisample 4.0 |
Intellisample 3.0 |
Other Characteristics |
Ring Bus Memory Controller,
Ultra-Threaded Shader Engine,
AVIVO |
Ring Bus Memory Controller,
Ultra-Threaded Shader Engine,
AVIVO |
Smartshader HD, Videoshader
HD, Hyper-Z HD |
CineFX 4.0, UltraShadow II, PureVideo |
CineFX 4.0, UltraShadow II, PureVideo |
CineFX 3.0, UltraShadow II, PureVideo |
The 7900GS is fully compatible with Shader Model 3.0, DirectX 9.0c and OpenGL 2.0. In addition, the video card also has support for HDR, transparency antialiasing, SLI, and PureVideo/PureVideo HD with support for XHD resolutions (2560x1600).
The product comes with a core clock of 450 MH and a memory clock of 1,320 MHz. The card also has a memory bandwidth of 42.2 GB/s thanks to the cards’ 256 bit wide bus.
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