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.

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.