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GeForce 8600 GT 1GB DDR2 vs GeForce 9800 GX2

Intro

The GeForce 8600 GT 1GB DDR2 uses a 80 nm design. nVidia has set the core frequency at 540 MHz. The DDR2 RAM runs at a frequency of 400 MHz on this specific card. It features 32 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

Compare those specifications to the GeForce 9800 GX2, which has a GPU core clock speed of 600 MHz, and 512 MB of GDDR3 memory running at 1000 MHz through a 256-bit bus. It also is comprised of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB DDR2 47 Watts
GeForce 9800 GX2 197 Watts
Difference: 150 Watts (319%)

Memory Bandwidth

The GeForce 9800 GX2 should theoretically be much faster than the GeForce 8600 GT 1GB DDR2 in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 8600 GT 1GB DDR2 12800 MB/sec
Difference: 115200 (900%)

Texel Rate

The GeForce 9800 GX2 is much (more or less 789%) more effective at AF than the GeForce 8600 GT 1GB DDR2. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 8600 GT 1GB DDR2 8640 Mtexels/sec
Difference: 68160 (789%)

Pixel Rate

The GeForce 9800 GX2 will be quite a bit (approximately 344%) faster with regards to anti-aliasing than the GeForce 8600 GT 1GB DDR2, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 8600 GT 1GB DDR2 4320 Mpixels/sec
Difference: 14880 (344%)

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 8600 GT 1GB DDR2

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 8600 GT 1GB DDR2 GeForce 9800 GX2
Manufacturer nVidia nVidia
Year April 2007 Mar 2008
Code Name G84 G92
Memory 1024 MB 512 MB (x2)
Core Speed 540 MHz 600 MHz (x2)
Memory Speed 800 MHz 2000 MHz (x2)
Power (Max TDP) 47 watts 197 watts
Bandwidth 12800 MB/sec 128000 MB/sec
Texel Rate 8640 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 32 128 (x2)
Texture Mapping Units 16 64 (x2)
Render Output Units 8 16 (x2)
Bus Type DDR2 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 80 nm 65 nm
Transistors 289 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 largest amount of data (counted in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 1GB DDR2

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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