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GeForce 8600 GT 256MB GDDR3 vs GeForce 8600 GTS

Intro

The GeForce 8600 GT 256MB GDDR3 features a core clock speed of 540 MHz and a GDDR3 memory speed of 700 MHz. It also uses a 128-bit bus, and makes use of a 80 nm design. It is made up of 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all of that to the GeForce 8600 GTS, which features a clock frequency of 675 MHz and a GDDR3 memory frequency of 1000 MHz. It also features a 128-bit memory bus, and uses a 80 nm design. It is comprised of 32 SPUs, 16 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 256MB GDDR3 47 Watts
GeForce 8600 GTS 75 Watts
Difference: 28 Watts (60%)

Memory Bandwidth

Theoretically speaking, the GeForce 8600 GTS will be 43% faster than the GeForce 8600 GT 256MB GDDR3 overall, because of its higher data rate. (explain)

GeForce 8600 GTS 32000 MB/sec
GeForce 8600 GT 256MB GDDR3 22400 MB/sec
Difference: 9600 (43%)

Texel Rate

The GeForce 8600 GTS should be much (more or less 25%) faster with regards to anisotropic filtering than the GeForce 8600 GT 256MB GDDR3. (explain)

GeForce 8600 GTS 10800 Mtexels/sec
GeForce 8600 GT 256MB GDDR3 8640 Mtexels/sec
Difference: 2160 (25%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 8600 GTS is superior to the GeForce 8600 GT 256MB GDDR3, by a large margin. (explain)

GeForce 8600 GTS 5400 Mpixels/sec
GeForce 8600 GT 256MB GDDR3 4320 Mpixels/sec
Difference: 1080 (25%)

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 256MB GDDR3

Amazon.com

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GeForce 8600 GTS

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 256MB GDDR3 GeForce 8600 GTS
Manufacturer nVidia nVidia
Year April 2007 April 2007
Code Name G84 G84
Memory 256 MB 512 MB
Core Speed 540 MHz 675 MHz
Memory Speed 1400 MHz 2000 MHz
Power (Max TDP) 47 watts 75 watts
Bandwidth 22400 MB/sec 32000 MB/sec
Texel Rate 8640 Mtexels/sec 10800 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 5400 Mpixels/sec
Unified Shaders 32 32
Texture Mapping Units 16 16
Render Output Units 8 8
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 80 nm 80 nm
Transistors 289 million 289 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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8600 GT 256MB GDDR3

Amazon.com

Check prices at:

GeForce 8600 GTS

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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