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GeForce 8800 GTX vs GeForce 8800 Ultra

Intro

The GeForce 8800 GTX comes with a GPU core clock speed of 575 MHz, and the 768 MB of GDDR3 memory runs at 900 MHz through a 384-bit bus. It also is made up of 128 SPUs, 64 Texture Address Units, and 24 ROPs.

Compare those specs to the GeForce 8800 Ultra, which makes use of a 90 nm design. nVidia has set the core speed at 612 MHz. The GDDR3 memory is set to run at a frequency of 1080 MHz on this particular card. It features 128 SPUs as well as 64 TAUs and 24 ROPs.

F.E.A.R. 2

Settings: Maximum Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Unknown (Source)
GeForce 8800 Ultra 46 FPS
GeForce 8800 GTX 42 FPS
Difference: 4 FPS (10%)

Fallout 3

Settings: Very High Quality
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce 8800 Ultra 45 FPS
GeForce 8800 GTX 21 FPS
Difference: 24 FPS (114%)

Fallout 3

Settings: Very High Quality
AA: 4x
AF: 8x
Resolution: 1680x1050
Test Machine: Tom's Hardware Charts Test Rig (Source)
GeForce 8800 Ultra 67 FPS
GeForce 8800 GTX 54 FPS
Difference: 13 FPS (24%)

Far Cry 2

Settings: Very High Qualty
AA: none
AF: none
Resolution: 1920x1200
Test Machine: Intel Core i7-920,3 x 2 GB Ram,Windows Vista Ultimate 32 Bit SP1 (Source)
GeForce 8800 Ultra 45 FPS
GeForce 8800 GTX 40 FPS
Difference: 5 FPS (13%)

Left4Dead

Settings: Very High Quality
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce 8800 Ultra 49 FPS
GeForce 8800 GTX 43 FPS
Difference: 6 FPS (14%)

Left4Dead

Settings: Very High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Charts Test Rig (Source)
GeForce 8800 Ultra 59 FPS
GeForce 8800 GTX 53 FPS
Difference: 6 FPS (11%)

Tom Clancy's Endwar

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce 8800 Ultra 20 FPS
GeForce 8800 GTX 17 FPS
Difference: 3 FPS (18%)

Tom Clancy's H.A.W.X

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1680x1050
Test Machine: Tom's Hardware Charts Test Rig (Source)
GeForce 8800 GTX 40 FPS
GeForce 8800 Ultra 39 FPS
Difference: 1 FPS (3%)

GeForce 8800 Ultra wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the GeForce 8800 Ultra wins overall, by 84 FPS. Please note that we do not have the results of every benchmark ever done for these cards, so the results may differ wildly in different games.

GeForce 8800 Ultra 415 FPS
GeForce 8800 GTX 331 FPS
Difference: 84 FPS (25%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTX 155 Watts
GeForce 8800 Ultra 171 Watts
Difference: 16 Watts (10%)

Memory Bandwidth

Performance-wise, the GeForce 8800 Ultra should theoretically be a little bit superior to the GeForce 8800 GTX overall. (explain)

GeForce 8800 Ultra 103680 MB/sec
GeForce 8800 GTX 86400 MB/sec
Difference: 17280 (20%)

Texel Rate

The GeForce 8800 Ultra should be just a bit (more or less 6%) better at AF than the GeForce 8800 GTX. (explain)

GeForce 8800 Ultra 39168 Mtexels/sec
GeForce 8800 GTX 36800 Mtexels/sec
Difference: 2368 (6%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 8800 Ultra is a better choice, but it probably won't make a huge difference. (explain)

GeForce 8800 Ultra 14688 Mpixels/sec
GeForce 8800 GTX 13800 Mpixels/sec
Difference: 888 (6%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

GeForce 8800 GTX

Amazon.com

GeForce 8800 Ultra

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce 8800 GTX GeForce 8800 Ultra
Manufacturer nVidia nVidia
Year Nov 2006 May 2007
Code Name G80 G80
Fab Process 90 nm 90 nm
Bus PCIe x16 PCIe x16
Memory 768 MB 768 MB
Core Speed 575 MHz 612 MHz
Shader Speed 1350 MHz 1500 MHz
Memory Speed 900 MHz (1800 MHz effective) 1080 MHz (2160 MHz effective)
Unified Shaders 128 128
Texture Mapping Units 64 64
Render Output Units 24 24
Bus Type GDDR3 GDDR3
Bus Width 384-bit 384-bit
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0
Power (Max TDP) 155 watts 171 watts
Shader Model 4.0 4.0
Bandwidth 86400 MB/sec 103680 MB/sec
Texel Rate 36800 Mtexels/sec 39168 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 14688 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

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