GeForce GTX 570 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which comes with GPU core speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 570		219 Watts
	Difference: 94 Watts (75%)

Memory Bandwidth

In theory, the Radeon R9 M390X will be 5% faster than the GeForce GTX 570 in general, due to its higher bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 570		152000 MB/sec
	Difference: 8000 (5%)

Texel Rate

The Radeon R9 M390X is quite a bit (approximately 111%) better at texture filtering than the GeForce GTX 570. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 570		43920 Mtexels/sec
	Difference: 48624 (111%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 570 is the winner, by a large margin. (explain)

GeForce GTX 570		29280 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 6144 (27%)

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 largest amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.