GeForce GTX 570 vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which has core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

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

Theoretically speaking, the Radeon R9 M390X should be a small bit faster than the GeForce GTX 570 overall. (explain)

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

Texel Rate

The Radeon R9 M390X should be much (about 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

The GeForce GTX 570 should be quite a bit (approximately 27%) more effective at AA than the Radeon R9 M390X, and should be capable of handling higher screen resolutions without losing too much performance. (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: Memory bandwidth is the largest amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.