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GeForce 8600 GT 1GB GDDR3 vs GeForce GTX 660

Intro

The GeForce 8600 GT 1GB GDDR3 makes use of a 80 nm design. nVidia has set the core speed at 540 MHz. The GDDR3 memory runs at a frequency of 700 MHz on this specific card. It features 32 SPUs as well as 16 Texture Address Units and 8 ROPs.

Compare that to the GeForce GTX 660, which comes with clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs as well as 80 Texture Address Units and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB GDDR3 47 Watts
GeForce GTX 660 140 Watts
Difference: 93 Watts (198%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should perform quite a bit faster than the GeForce 8600 GT 1GB GDDR3 in general. (explain)

GeForce GTX 660 144192 MB/sec
GeForce 8600 GT 1GB GDDR3 22400 MB/sec
Difference: 121792 (544%)

Texel Rate

The GeForce GTX 660 is a lot (about 807%) faster with regards to texture filtering than the GeForce 8600 GT 1GB GDDR3. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce 8600 GT 1GB GDDR3 8640 Mtexels/sec
Difference: 69760 (807%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 is a better choice, and very much so. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce 8600 GT 1GB GDDR3 4320 Mpixels/sec
Difference: 19200 (444%)

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 1GB GDDR3

Amazon.com

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GeForce GTX 660

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 1GB GDDR3 GeForce GTX 660
Manufacturer nVidia nVidia
Year April 2007 September 2012
Code Name G84 GK106
Memory 1024 MB 2048 MB
Core Speed 540 MHz 980 MHz
Memory Speed 1400 MHz 6008 MHz
Power (Max TDP) 47 watts 140 watts
Bandwidth 22400 MB/sec 144192 MB/sec
Texel Rate 8640 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 32 960
Texture Mapping Units 16 80
Render Output Units 8 24
Bus Type GDDR3 GDDR5
Bus Width 128-bit 192-bit
Fab Process 80 nm 28 nm
Transistors 289 million 2540 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

GeForce GTX 660

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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