Geforce GTX 670 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which has GPU clock speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

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

The Geforce GTX 670 should in theory be a little bit faster than the Radeon R9 M295X overall. (explain)

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

Texel Rate

The Geforce GTX 670 is a small bit (more or less 7%) faster with regards to 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

The Geforce GTX 670 is much (more or less 22%) faster with regards to AA than the Radeon R9 M295X, and will be able to handle higher screen resolutions without slowing down too much. (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 maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 can be applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.