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GeForce 8600 GT 512MB DDR2 vs GeForce 8800 GT 512MB

Intro

The GeForce 8600 GT 512MB DDR2 makes use of a 80 nm design. nVidia has set the core speed at 540 MHz. The DDR2 RAM works at a speed of 400 MHz on this model. It features 32 SPUs as well as 16 Texture Address Units and 8 Rasterization Operator Units.

Compare that to the GeForce 8800 GT 512MB, which has a core clock speed of 600 MHz and a GDDR3 memory speed of 900 MHz. It also features a 256-bit bus, and makes use of a 65 nm design. It is made up of 112 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
GeForce 8800 GT 512MB 105 Watts
Difference: 58 Watts (123%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GT 512MB should be 350% faster than the GeForce 8600 GT 512MB DDR2 in general, due to its higher data rate. (explain)

GeForce 8800 GT 512MB 57600 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 44800 (350%)

Texel Rate

The GeForce 8800 GT 512MB will be a lot (approximately 289%) better at anisotropic filtering than the GeForce 8600 GT 512MB DDR2. (explain)

GeForce 8800 GT 512MB 33600 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 24960 (289%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 8800 GT 512MB is superior to the GeForce 8600 GT 512MB DDR2, by far. (explain)

GeForce 8800 GT 512MB 9600 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 5280 (122%)

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

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GeForce 8800 GT 512MB

Amazon.com

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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 GT 512MB
Manufacturer nVidia nVidia
Year April 2007 Oct 2007
Code Name G84 G92
Memory 512 MB 512 MB
Core Speed 540 MHz 600 MHz
Memory Speed 800 MHz 1800 MHz
Power (Max TDP) 47 watts 105 watts
Bandwidth 12800 MB/sec 57600 MB/sec
Texel Rate 8640 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 32 112
Texture Mapping Units 16 56
Render Output Units 8 16
Bus Type DDR2 GDDR3
Bus Width 128-bit 256-bit
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 (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be processed per second. This figure 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 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. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

GeForce 8800 GT 512MB

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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