GeForce 8800 GTS (G80) 640MB vs GeForce GTX 650 Ti 2GB

Intro

Compare those specs to the GeForce GTX 650 Ti 2GB, which uses a 28 nm design. nVidia has clocked the core speed at 928 MHz. The GDDR5 memory runs at a frequency of 1350 MHz on this particular card. It features 768 SPUs along with 64 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 33 Watts (30%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti 2GB should theoretically be a lot better than the GeForce 8800 GTS (G80) 640MB in general. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 23040 (36%)

Texel Rate

The GeForce GTX 650 Ti 2GB is quite a bit (more or less 141%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 34768 (141%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 650 Ti 2GB is superior to the GeForce 8800 GTS (G80) 640MB, and very much so. (explain)

GeForce GTX 650 Ti 2GB		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: Bandwidth is the maximum amount of data (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.