GeForce 8800 GT 1GB vs GeForce GTX 660

Intro

Compare those specifications to the GeForce GTX 660, which makes use of a 28 nm design. nVidia has set the core frequency at 980 MHz. The GDDR5 memory runs at a frequency of 1502 MHz on this specific card. It features 960 SPUs along with 80 Texture Address Units 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 150% quicker than the GeForce 8800 GT 1GB in general, due to its greater bandwidth. (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 a lot (approximately 133%) more effective 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 is much (more or less 145%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 1GB, and also should be capable of handling higher resolutions better. (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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.