GeForce 8800 GTS (G80) 640MB vs GeForce GTX 650 Ti

Intro

Compare all that to the GeForce GTX 650 Ti, which has a core clock speed of 928 MHz and a GDDR5 memory frequency of 1350 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is made up of 768 SPUs, 64 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 33 Watts (30%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti should theoretically be quite a bit superior to the GeForce 8800 GTS (G80) 640MB in general. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 23040 (36%)

Texel Rate

The GeForce GTX 650 Ti should be a lot (about 141%) more effective at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 34768 (141%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 650 Ti is superior to the GeForce 8800 GTS (G80) 640MB, by far. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 4588 (45%)

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 max amount of information (counted in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant 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 reach the maximum fill rate.