Geforce GTX 670 vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which features a core clock speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It features 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 M395X		125 Watts
Geforce GTX 670		170 Watts
	Difference: 45 Watts (36%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 670 should in theory be just a bit better than the Radeon R9 M395X overall. (explain)

Geforce GTX 670		192000 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 32000 (20%)

Texel Rate

The Geforce GTX 670 is just a bit (about 11%) more effective at texture filtering than the Radeon R9 M395X. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 9936 (11%)

Pixel Rate

The Geforce GTX 670 will be quite a bit (approximately 27%) more effective at anti-aliasing than the Radeon R9 M395X, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 6144 (27%)

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 past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 are processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video 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 number of pixels that the graphics card could possibly record to the 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 core speed of the card. 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.