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GeForce 8800 GTX vs GeForce 9800 GTX

Intro

The GeForce 8800 GTX makes use of a 90 nm design. nVidia has set the core frequency at 575 MHz. The GDDR3 memory is set to run at a speed of 900 MHz on this model. It features 128 SPUs along with 64 TAUs and 24 ROPs.

Compare all of that to the GeForce 9800 GTX, which makes use of a 65 nm design. nVidia has clocked the core speed at 675 MHz. The GDDR3 memory works at a speed of 1100 MHz on this particular model. It features 128 SPUs along with 64 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX 140 Watts
GeForce 8800 GTX 155 Watts
Difference: 15 Watts (11%)

Memory Bandwidth

In theory, the GeForce 8800 GTX should be 23% faster than the GeForce 9800 GTX in general, due to its higher bandwidth. (explain)

GeForce 8800 GTX 86400 MB/sec
GeForce 9800 GTX 70400 MB/sec
Difference: 16000 (23%)

Texel Rate

The GeForce 9800 GTX is a bit (more or less 17%) better at AF than the GeForce 8800 GTX. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
GeForce 8800 GTX 36800 Mtexels/sec
Difference: 6400 (17%)

Pixel Rate

The GeForce 8800 GTX will be much (about 28%) faster with regards to anti-aliasing than the GeForce 9800 GTX, and also able to handle higher resolutions while still performing well. (explain)

GeForce 8800 GTX 13800 Mpixels/sec
GeForce 9800 GTX 10800 Mpixels/sec
Difference: 3000 (28%)

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

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GeForce 8800 GTX

Amazon.com

Check prices at:

GeForce 9800 GTX

Amazon.com

Check prices at:

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

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Model GeForce 8800 GTX GeForce 9800 GTX
Manufacturer nVidia nVidia
Year Nov 2006 April 2008
Code Name G80 G92
Memory 768 MB 512 MB
Core Speed 575 MHz 675 MHz
Memory Speed 1800 MHz 2200 MHz
Power (Max TDP) 155 watts 140 watts
Bandwidth 86400 MB/sec 70400 MB/sec
Texel Rate 36800 Mtexels/sec 43200 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 10800 Mpixels/sec
Unified Shaders 128 128
Texture Mapping Units 64 64
Render Output Units 24 16
Bus Type GDDR3 GDDR3
Bus Width 384-bit 256-bit
Fab Process 90 nm 65 nm
Transistors 681 million 754 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 8800 GTX

Amazon.com

Check prices at:

GeForce 9800 GTX

Amazon.com

Check prices at:

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.

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