GeForce 8800 GTS (G80) 640MB vs GeForce GTX 750

Intro

Compare those specifications to the GeForce GTX 750, which comes with core speeds of 1020 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 512 SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 88 Watts (160%)

Memory Bandwidth

The GeForce GTX 750 should theoretically be quite a bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

GeForce GTX 750		80000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 16640 (26%)

Texel Rate

The GeForce GTX 750 should be a lot (approximately 33%) more effective at AF than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 750		32640 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 8016 (33%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 750 is superior to the GeForce 8800 GTS (G80) 640MB, and very much so. (explain)

GeForce GTX 750		16320 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 6060 (59%)

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 data (counted in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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