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GeForce 8600 GT 1GB GDDR3 vs GeForce GTX 660

Intro

The GeForce 8600 GT 1GB GDDR3 features a core clock speed of 540 MHz and a GDDR3 memory frequency of 700 MHz. It also features a 128-bit memory bus, and makes use of a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the GeForce GTX 660, which makes use of a 28 nm design. nVidia has clocked the core speed at 980 MHz. The GDDR5 memory works at a frequency of 1502 MHz on this model. It features 960 SPUs as well as 80 TAUs and 24 Rasterization Operator Units.

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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, the GeForce GTX 660 should perform much 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 will be a lot (more or less 807%) better at anisotropic 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

The GeForce GTX 660 will be a lot (more or less 444%) faster with regards to FSAA than the GeForce 8600 GT 1GB GDDR3, and will be capable of handling higher screen resolutions more effectively. (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

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.

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 largest amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, 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 amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum 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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