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GeForce 8800 GS vs GeForce 9800 GX2

Intro

The GeForce 8800 GS uses a 65 nm design. nVidia has set the core speed at 550 MHz. The GDDR3 memory runs at a frequency of 800 MHz on this specific model. It features 96 SPUs along with 48 TAUs and 12 ROPs.

Compare all of that 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 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GS 105 Watts
GeForce 9800 GX2 197 Watts
Difference: 92 Watts (88%)

Memory Bandwidth

The GeForce 9800 GX2, in theory, should perform quite a bit faster than the GeForce 8800 GS in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GS 38400 MB/sec
Difference: 89600 (233%)

Texel Rate

The GeForce 9800 GX2 will be a lot (approximately 191%) more effective at AF than the GeForce 8800 GS. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GS 26400 Mtexels/sec
Difference: 50400 (191%)

Pixel Rate

The GeForce 9800 GX2 should be quite a bit (more or less 191%) more effective at anti-aliasing than the GeForce 8800 GS, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8800 GS 6600 Mpixels/sec
Difference: 12600 (191%)

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 GS

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.

Specifications

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Model GeForce 8800 GS GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Jan 2008 Mar 2008
Code Name G92 G92
Memory 384 MB 512 MB (x2)
Core Speed 550 MHz 600 MHz (x2)
Memory Speed 1600 MHz 2000 MHz (x2)
Power (Max TDP) 105 watts 197 watts
Bandwidth 38400 MB/sec 128000 MB/sec
Texel Rate 26400 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 6600 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 96 128 (x2)
Texture Mapping Units 48 64 (x2)
Render Output Units 12 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 192-bit 256-bit (x2)
Fab Process 65 nm 65 nm
Transistors 754 million 754 million
Bus PCIe x16 2.0 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 megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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 filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GS

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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