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GeForce 8800 GTS (G80) 320MB vs GeForce 9800 GX2

Intro

The GeForce 8800 GTS (G80) 320MB features a GPU core speed of 513 MHz, and the 320 MB of GDDR3 memory runs at 792 MHz through a 320-bit bus. It also features 96 SPUs, 48 Texture Address Units, and 20 ROPs.

Compare that to the GeForce 9800 GX2, which has clock speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB 143 Watts
GeForce 9800 GX2 197 Watts
Difference: 54 Watts (38%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should theoretically be a lot better than the GeForce 8800 GTS (G80) 320MB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 64640 (102%)

Texel Rate

The GeForce 9800 GX2 will be a lot (more or less 212%) better at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 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) 320MB 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) 320MB

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) 320MB GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Feb 2007 Mar 2008
Code Name G80 G92
Memory 320 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 max amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant 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) 320MB

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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