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GeForce 8600 GT 512MB GDDR3 vs GeForce 8800 GTS (G80) 640MB

Intro

The GeForce 8600 GT 512MB GDDR3 comes with a clock frequency of 540 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit memory bus, and uses a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the GeForce 8800 GTS (G80) 640MB, which has core clock speeds of 513 MHz on the GPU, and 792 MHz on the 640 MB of GDDR3 RAM. It features 96 SPUs as well as 48 Texture Address Units and 20 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB GDDR3 47 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 96 Watts (204%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G80) 640MB should be much faster than the GeForce 8600 GT 512MB GDDR3 in general. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
GeForce 8600 GT 512MB GDDR3 22400 MB/sec
Difference: 40960 (183%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB should be a lot (more or less 185%) more effective at AF than the GeForce 8600 GT 512MB GDDR3. (explain)

GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
GeForce 8600 GT 512MB GDDR3 8640 Mtexels/sec
Difference: 15984 (185%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 8800 GTS (G80) 640MB is superior to the GeForce 8600 GT 512MB GDDR3, by a large margin. (explain)

GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
GeForce 8600 GT 512MB GDDR3 4320 Mpixels/sec
Difference: 5940 (138%)

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.

Price Comparison

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GeForce 8600 GT 512MB GDDR3

Amazon.com

Check prices at:

GeForce 8800 GTS (G80) 640MB

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 512MB GDDR3 GeForce 8800 GTS (G80) 640MB
Manufacturer nVidia nVidia
Year April 2007 Nov 2006 (640)
Code Name G84 G80
Memory 512 MB 640 MB
Core Speed 540 MHz 513 MHz
Memory Speed 1400 MHz 1584 MHz
Power (Max TDP) 47 watts 143 watts
Bandwidth 22400 MB/sec 63360 MB/sec
Texel Rate 8640 Mtexels/sec 24624 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 10260 Mpixels/sec
Unified Shaders 32 96
Texture Mapping Units 16 48
Render Output Units 8 20
Bus Type GDDR3 GDDR3
Bus Width 128-bit 320-bit
Fab Process 80 nm 90 nm
Transistors 289 million 681 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be transported 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. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 are processed in one second. This 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 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 maximum amount of pixels that the graphics chip can possibly write to the local memory in one 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 called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB GDDR3

Amazon.com

Check prices at:

GeForce 8800 GTS (G80) 640MB

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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