Compare any two graphics cards:
GeForce 8800 GTX vs GeForce 8800 Ultra
Intro
The GeForce 8800 GTX features a core clock speed of 575 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 384-bit bus, and uses a 90 nm design. It features 128 SPUs, 64 Texture Address Units, and 24 Raster Operation Units.
Compare those specs to the GeForce 8800 Ultra, which comes with core clock speeds of 612 MHz on the GPU, and 1080 MHz on the 768 MB of GDDR3 RAM. It features 128 SPUs along with 64 Texture Address Units and 24 Rasterization Operator Units.
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
Theoretically, the GeForce 8800 Ultra should be a little bit faster than 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 will be just a bit (about 6%) better at texture filtering than the GeForce 8800 GTX. (
explain)
| GeForce 8800 Ultra |
|
39168 Mtexels/sec |
| GeForce 8800 GTX |
|
36800 Mtexels/sec |
| |
Difference: 2368 (6%)
|
|
Pixel Rate
If using lots of anti-aliasing is important to you, then the GeForce 8800 Ultra is the winner, not by a very large margin though. (
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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
GeForce 8800 GTX
Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
GeForce 8800 Ultra
Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
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 |
1080 MHz |
| 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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead.
The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at 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 could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image).
The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.
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