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GeForce 8800 GTS (G80) 640MB vs GeForce 9800 GX2

Intro

The GeForce 8800 GTS (G80) 640MB uses a 90 nm design. nVidia has set the core frequency at 513 MHz. The GDDR3 RAM runs at a speed of 792 MHz on this card. It features 96 SPUs as well as 48 TAUs and 20 ROPs.

Compare those specifications to the GeForce 9800 GX2, which features core speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs as well as 64 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB 143 Watts
GeForce 9800 GX2 197 Watts
Difference: 54 Watts (38%)

Memory Bandwidth

Theoretically speaking, the GeForce 9800 GX2 should be much faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 64640 (102%)

Texel Rate

The GeForce 9800 GX2 will be quite a bit (about 212%) more effective at AF than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 52176 (212%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 9800 GX2 is a better choice, by far. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 8940 (87%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce 8800 GTS (G80) 640MB

Amazon.com

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GeForce 9800 GX2

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 GTS (G80) 640MB GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Nov 2006 (640) Mar 2008
Code Name G80 G92
Memory 640 MB 512 MB (x2)
Core Speed 513 MHz 600 MHz (x2)
Memory Speed 1584 MHz 2000 MHz (x2)
Power (Max TDP) 143 watts 197 watts
Bandwidth 63360 MB/sec 128000 MB/sec
Texel Rate 24624 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 96 128 (x2)
Texture Mapping Units 48 64 (x2)
Render Output Units 20 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 320-bit 256-bit (x2)
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 (in units of MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, 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 maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce 9800 GX2

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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