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GeForce 8800 GT 1GB vs GeForce 9800 GX2

Intro

The GeForce 8800 GT 1GB has core speeds of 600 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 RAM. It features 112 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs 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 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB 105 Watts
GeForce 9800 GX2 197 Watts
Difference: 92 Watts (88%)

Memory Bandwidth

Theoretically, the GeForce 9800 GX2 should be quite a bit faster than the GeForce 8800 GT 1GB overall. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8800 GT 1GB 57600 MB/sec
Difference: 70400 (122%)

Texel Rate

The GeForce 9800 GX2 should be a lot (approximately 129%) more effective at AF than the GeForce 8800 GT 1GB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8800 GT 1GB 33600 Mtexels/sec
Difference: 43200 (129%)

Pixel Rate

The GeForce 9800 GX2 will be quite a bit (about 100%) more effective at AA than the GeForce 8800 GT 1GB, and also will be able to handle higher resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8800 GT 1GB 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 1GB

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 1GB GeForce 9800 GX2
Manufacturer nVidia nVidia
Year Dec 2007 Mar 2008
Code Name G92 G92
Memory 1024 MB 512 MB (x2)
Core Speed 600 MHz 600 MHz (x2)
Memory Speed 1800 MHz 2000 MHz (x2)
Power (Max TDP) 105 watts 197 watts
Bandwidth 57600 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: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. 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 faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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

Display Prices

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GeForce 8800 GT 1GB

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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