GeForce GTX 560 vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 560		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

The Radeon R9 M390X should theoretically be quite a bit faster than the GeForce GTX 560 in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 560		128128 MB/sec
	Difference: 31872 (25%)

Texel Rate

The Radeon R9 M390X is quite a bit (more or less 104%) better at AF than the GeForce GTX 560. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 560		45360 Mtexels/sec
	Difference: 47184 (104%)

Pixel Rate

The GeForce GTX 560 should be a little bit (about 12%) more effective at FSAA than the Radeon R9 M390X, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 560		25920 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 2784 (12%)

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 (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video 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 most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.