GeForce GTX 560 Ti vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which has GPU core speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 560 Ti		170 Watts
	Difference: 45 Watts (36%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be 25% faster than the GeForce GTX 560 Ti overall, due to its higher bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 560 Ti		128256 MB/sec
	Difference: 31744 (25%)

Texel Rate

The Radeon R9 M390X will be quite a bit (about 76%) better at AF than the GeForce GTX 560 Ti. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 560 Ti		52608 Mtexels/sec
	Difference: 39936 (76%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 560 Ti is the winner, not by a very large margin though. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 3168 (14%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock 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 is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.