GeForce GTX 560 vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features 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 Texture Address Units, 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		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X is 25% faster than the GeForce GTX 560 overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 M390X will be much (approximately 104%) faster with regards to texture filtering 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 is a little bit (about 12%) more effective at AA than the Radeon R9 M390X, and capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.