GeForce 8800 GTS (G80) 640MB vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which features a core clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 18 Watts (14%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should in theory be quite a bit superior to the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 112640 (178%)

Texel Rate

The Radeon R9 M295X will be much (about 290%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 71376 (290%)

Pixel Rate

The Radeon R9 M295X should be much (more or less 134%) more effective at anti-aliasing than the GeForce 8800 GTS (G80) 640MB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 13740 (134%)

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 megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's 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 better the 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 texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount 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 colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.