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GeForce 8600 GT 512MB DDR2 vs GeForce 8800 GTS (G80) 640MB

Intro

The GeForce 8600 GT 512MB DDR2 has a clock frequency of 540 MHz and a DDR2 memory speed of 400 MHz. It also makes use of a 128-bit memory bus, and makes use of a 80 nm design. It features 32 SPUs, 16 TAUs, and 8 Raster Operation Units.

Compare all that to the GeForce 8800 GTS (G80) 640MB, which has a core clock frequency of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also makes use of a 320-bit bus, and makes use of a 90 nm design. It is comprised of 96 SPUs, 48 Texture Address Units, and 20 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 96 Watts (204%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTS (G80) 640MB should perform much faster than the GeForce 8600 GT 512MB DDR2 overall. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 50560 (395%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB should be quite a bit (approximately 185%) more effective at texture filtering than the GeForce 8600 GT 512MB DDR2. (explain)

GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 15984 (185%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB is much (about 138%) better at AA than the GeForce 8600 GT 512MB DDR2, and should be able to handle higher screen resolutions better. (explain)

GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
GeForce 8600 GT 512MB DDR2 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 DDR2

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 DDR2 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 800 MHz 1584 MHz
Power (Max TDP) 47 watts 143 watts
Bandwidth 12800 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 DDR2 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 data (in units of MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 texture units by the core speed of the chip. The higher this number, the better the 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 most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB DDR2

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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