GeForce 8800 GT 512MB vs GeForce GTX 660 Ti

Intro

Compare that to the GeForce GTX 660 Ti, which comes with GPU clock speed of 915 MHz, and 2048 MB of GDDR5 RAM set to run at 1500 MHz through a 192-bit bus. It also is made up of 1344 SPUs, 112 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 45 Watts (43%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti should be a lot faster than the GeForce 8800 GT 512MB overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 86400 (150%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (approximately 205%) faster with regards to AF than the GeForce 8800 GT 512MB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 68880 (205%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 Ti is a better choice, by a large margin. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 12360 (129%)

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 information (in units of megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.