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GeForce 8600 GTS vs GeForce 8800 GT 256MB

Intro

The GeForce 8600 GTS uses a 80 nm design. nVidia has clocked the core speed at 675 MHz. The GDDR3 RAM works at a speed of 1000 MHz on this particular model. It features 32 SPUs along with 16 Texture Address Units and 8 ROPs.

Compare those specs to the GeForce 8800 GT 256MB, which comes with a clock frequency of 600 MHz and a GDDR3 memory speed of 700 MHz. It also features a 256-bit bus, and uses a 65 nm design. It features 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 GTS 75 Watts
GeForce 8800 GT 256MB 105 Watts
Difference: 30 Watts (40%)

Memory Bandwidth

In theory, the GeForce 8800 GT 256MB will be 40% faster than the GeForce 8600 GTS in general, due to its greater data rate. (explain)

GeForce 8800 GT 256MB 44800 MB/sec
GeForce 8600 GTS 32000 MB/sec
Difference: 12800 (40%)

Texel Rate

The GeForce 8800 GT 256MB will be much (about 211%) faster with regards to texture filtering than the GeForce 8600 GTS. (explain)

GeForce 8800 GT 256MB 33600 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 22800 (211%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 8800 GT 256MB is superior to the GeForce 8600 GTS, by a large margin. (explain)

GeForce 8800 GT 256MB 9600 Mpixels/sec
GeForce 8600 GTS 5400 Mpixels/sec
Difference: 4200 (78%)

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 GTS

Amazon.com

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GeForce 8800 GT 256MB

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 GTS GeForce 8800 GT 256MB
Manufacturer nVidia nVidia
Year April 2007 Dec 2007
Code Name G84 G92
Memory 512 MB 256 MB
Core Speed 675 MHz 600 MHz
Memory Speed 2000 MHz 1400 MHz
Power (Max TDP) 75 watts 105 watts
Bandwidth 32000 MB/sec 44800 MB/sec
Texel Rate 10800 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 32 112
Texture Mapping Units 16 56
Render Output Units 8 16
Bus Type GDDR3 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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher 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 number 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 worked out by multiplying the number of Render Output Units 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 also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce 8600 GTS

Amazon.com

Check prices at:

GeForce 8800 GT 256MB

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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