GeForce 8800 GT 256MB vs GeForce GTX 660 Ti

Intro

Compare those specifications to the GeForce GTX 660 Ti, which uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory runs at a speed of 1500 MHz on this particular model. It features 1344 SPUs along with 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 256MB		105 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 45 Watts (43%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti should perform quite a bit faster than the GeForce 8800 GT 256MB overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce 8800 GT 256MB		44800 MB/sec
	Difference: 99200 (221%)

Texel Rate

The GeForce GTX 660 Ti should be a lot (about 205%) better at anisotropic filtering than the GeForce 8800 GT 256MB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce 8800 GT 256MB		33600 Mtexels/sec
	Difference: 68880 (205%)

Pixel Rate

The GeForce GTX 660 Ti is a lot (approximately 129%) better at FSAA than the GeForce 8800 GT 256MB, and also should be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce 8800 GT 256MB		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 largest amount of data (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the most 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 number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.