GeForce GTX 590 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which has a clock frequency of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, 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 590		365 Watts
	Difference: 240 Watts (192%)

Memory Bandwidth

In theory, the GeForce GTX 590 should be 87% quicker than the Radeon R9 M295X in general, because of its higher data rate. (explain)

GeForce GTX 590		328320 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 152320 (87%)

Texel Rate

The Radeon R9 M295X will be quite a bit (more or less 24%) better at texture filtering than the GeForce GTX 590. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 590		77696 Mtexels/sec
	Difference: 18304 (24%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 590 is superior to the Radeon R9 M295X, by far. (explain)

GeForce GTX 590		58272 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 34272 (143%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.