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GeForce 8800 GT 256MB vs GeForce 9800 GX2

Intro

The GeForce 8800 GT 256MB comes with a GPU core speed of 600 MHz, and the 256 MB of GDDR3 memory is set to run at 700 MHz through a 256-bit bus. It also features 112 SPUs, 56 Texture Address Units, and 16 ROPs.

Compare all of that to the GeForce 9800 GX2, which comes with core 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 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 256MB 105 Watts
GeForce 9800 GX2 197 Watts
Difference: 92 Watts (88%)

Memory Bandwidth

Theoretically, the GeForce 9800 GX2 should be a lot faster than the GeForce 8800 GT 256MB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GT 256MB 44800 MB/sec
Difference: 83200 (186%)

Texel Rate

The GeForce 9800 GX2 should be a lot (more or less 129%) more effective at anisotropic filtering than the GeForce 8800 GT 256MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GT 256MB 33600 Mtexels/sec
Difference: 43200 (129%)

Pixel Rate

The GeForce 9800 GX2 should be quite a bit (about 100%) more effective at anti-aliasing than the GeForce 8800 GT 256MB, and should be capable of handling higher screen resolutions better. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8800 GT 256MB 9600 Mpixels/sec
Difference: 9600 (100%)

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 GT 256MB

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 GT 256MB GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Dec 2007 Mar 2008
Code Name G92 G92
Memory 256 MB 512 MB (x2)
Core Speed 600 MHz 600 MHz (x2)
Memory Speed 1400 MHz 2000 MHz (x2)
Power (Max TDP) 105 watts 197 watts
Bandwidth 44800 MB/sec 128000 MB/sec
Texel Rate 33600 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 112 128 (x2)
Texture Mapping Units 56 64 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 256-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 maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at 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 that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GT 256MB

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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