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GeForce 8600 GTS vs GeForce GTS 250 1GB

Intro

The GeForce 8600 GTS uses a 80 nm design. nVidia has set the core speed at 675 MHz. The GDDR3 memory is set to run at a frequency of 1000 MHz on this particular card. It features 32 SPUs as well as 16 Texture Address Units and 8 Rasterization Operator Units.

Compare those specs to the GeForce GTS 250 1GB, which has a GPU core clock speed of 738 MHz, and 1024 MB of GDDR3 memory set to run at 1100 MHz through a 256-bit bus. It also is made up of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GTS 75 Watts
GeForce GTS 250 1GB 145 Watts
Difference: 70 Watts (93%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 250 1GB is 120% quicker than the GeForce 8600 GTS in general, because of its greater data rate. (explain)

GeForce GTS 250 1GB 70400 MB/sec
GeForce 8600 GTS 32000 MB/sec
Difference: 38400 (120%)

Texel Rate

The GeForce GTS 250 1GB is a lot (approximately 337%) better at AF than the GeForce 8600 GTS. (explain)

GeForce GTS 250 1GB 47232 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 36432 (337%)

Pixel Rate

The GeForce GTS 250 1GB is quite a bit (about 119%) better at full screen anti-aliasing than the GeForce 8600 GTS, and should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTS 250 1GB 11808 Mpixels/sec
GeForce 8600 GTS 5400 Mpixels/sec
Difference: 6408 (119%)

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

Display Prices

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GeForce 8600 GTS

Amazon.com

GeForce GTS 250 1GB

Amazon.com

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 GTS 250 1GB
Manufacturer nVidia nVidia
Year April 2007 March 3, 2009
Code Name G84 G92a/b
Fab Process 80 nm 65/55 nm
Bus PCIe x16 PCIe x16 2.0
Memory 512 MB 1024 MB
Core Speed 675 MHz 738 MHz
Shader Speed 1450 MHz 1836 MHz
Memory Speed 2000 MHz 2200 MHz
Unified Shaders 32 128
Texture Mapping Units 16 64
Render Output Units 8 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-bit
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.1
Power (Max TDP) 75 watts 145 watts
Shader Model 4.0 4.0
Bandwidth 32000 MB/sec 70400 MB/sec
Texel Rate 10800 Mtexels/sec 47232 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 11808 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once 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 AA, High Dynamic Range and higher screen 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 the texel rate, the better the video card will be at 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. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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