GeForce GTX 590 vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which features GPU clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 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 M395X		125 Watts
GeForce GTX 590		365 Watts
	Difference: 240 Watts (192%)

Memory Bandwidth

Performance-wise, the GeForce GTX 590 should theoretically be a lot better than the Radeon R9 M395X in general. (explain)

GeForce GTX 590		328320 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 168320 (105%)

Texel Rate

The Radeon R9 M395X will be a little bit (more or less 19%) more effective at AF than the GeForce GTX 590. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 590		77696 Mtexels/sec
	Difference: 14848 (19%)

Pixel Rate

The GeForce GTX 590 is much (approximately 152%) faster with regards to anti-aliasing than the Radeon R9 M395X, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 590		58272 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 35136 (152%)

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 maximum amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.