Geforce GTX 670 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which features a core clock frequency of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, 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 GTX 670		170 Watts
	Difference: 45 Watts (36%)

Memory Bandwidth

Performance-wise, the Geforce GTX 670 should in theory be just a bit superior to the Radeon R9 M295X in general. (explain)

Geforce GTX 670		192000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 16000 (9%)

Texel Rate

The Geforce GTX 670 should be just a bit (about 7%) more effective at texture filtering than the Radeon R9 M295X. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 6480 (7%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 670 is the winner, by far. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 5280 (22%)

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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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.