GeForce GTX 590 vs Radeon R9 M275X

Intro

Compare all that to the Radeon R9 M275X, which has a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 590		365 Watts
	Difference: 315 Watts (630%)

Memory Bandwidth

In theory, the GeForce GTX 590 is 356% faster than the Radeon R9 M275X in general, due to its higher bandwidth. (explain)

GeForce GTX 590		328320 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 256320 (356%)

Texel Rate

The GeForce GTX 590 will be much (about 116%) more effective at anisotropic filtering than the Radeon R9 M275X. (explain)

GeForce GTX 590		77696 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 41696 (116%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 590 is a better choice, by far. (explain)

GeForce GTX 590		58272 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 43872 (305%)

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 information (measured in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.