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GeForce 8800 GT 512MB vs GeForce GTX 660

Intro

The GeForce 8800 GT 512MB comes with core clock speeds of 600 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 112 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the GeForce GTX 660, which comes with GPU core speed of 980 MHz, and 2048 MB of GDDR5 memory set to run at 1502 MHz through a 192-bit bus. It also is comprised of 960 Stream Processors, 80 Texture Address Units, and 24 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB 105 Watts
GeForce GTX 660 140 Watts
Difference: 35 Watts (33%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should in theory be much better than the GeForce 8800 GT 512MB in general. (explain)

GeForce GTX 660 144192 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 86592 (150%)

Texel Rate

The GeForce GTX 660 should be a lot (about 133%) faster with regards to texture filtering than the GeForce 8800 GT 512MB. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce 8800 GT 512MB 33600 Mtexels/sec
Difference: 44800 (133%)

Pixel Rate

The GeForce GTX 660 will be quite a bit (about 145%) more effective at anti-aliasing than the GeForce 8800 GT 512MB, and also should be able to handle higher resolutions better. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 13920 (145%)

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 8800 GT 512MB

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 8800 GT 512MB GeForce GTX 660
Manufacturer nVidia nVidia
Year Oct 2007 September 2012
Code Name G92 GK106
Memory 512 MB 2048 MB
Core Speed 600 MHz 980 MHz
Memory Speed 1800 MHz 6008 MHz
Power (Max TDP) 105 watts 140 watts
Bandwidth 57600 MB/sec 144192 MB/sec
Texel Rate 33600 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 112 960
Texture Mapping Units 56 80
Render Output Units 16 24
Bus Type GDDR3 GDDR5
Bus Width 256-bit 192-bit
Fab Process 65 nm 28 nm
Transistors 754 million 2540 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 8800 GT 512MB

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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