GeForce 8800 GT 1GB vs GeForce GTX 660

Intro

Compare those specs to the GeForce GTX 660, which uses a 28 nm design. nVidia has clocked the core speed at 980 MHz. The GDDR5 memory is set to run at a speed of 1502 MHz on this model. It features 960 SPUs along with 80 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB		105 Watts
GeForce GTX 660		140 Watts
	Difference: 35 Watts (33%)

Memory Bandwidth

In theory, the GeForce GTX 660 should be much faster than the GeForce 8800 GT 1GB overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 86592 (150%)

Texel Rate

The GeForce GTX 660 should be much (more or less 133%) better at texture filtering than the GeForce 8800 GT 1GB. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 44800 (133%)

Pixel Rate

The GeForce GTX 660 should be a lot (approximately 145%) more effective at full screen anti-aliasing than the GeForce 8800 GT 1GB, and also will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce 8800 GT 1GB		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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.