GeForce GTX 570 vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which comes with core clock speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 570 should be 111% faster than the Radeon R9 M270X in general, because of its greater data rate. (explain)

GeForce GTX 570		152000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 80000 (111%)

Texel Rate

The GeForce GTX 570 will be much (more or less 51%) faster with regards to texture filtering than the Radeon R9 M270X. (explain)

GeForce GTX 570		43920 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 14920 (51%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 570 is superior to the Radeon R9 M270X, and very much so. (explain)

GeForce GTX 570		29280 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 17680 (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.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.