GeForce GTX 570 vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which comes with GPU clock speed of 723 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 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

The Radeon R9 M390X should theoretically be just a bit faster than the GeForce GTX 570 in general. (explain)

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

Texel Rate

The Radeon R9 M390X should be a lot (about 111%) faster with regards to AF 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 will be quite a bit (approximately 27%) faster with regards to full screen anti-aliasing than the Radeon R9 M390X, and also will be able to handle higher resolutions while still performing well. (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 max amount of data (counted in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling 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 the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.