GeForce GTX 560 Ti 448 vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which has clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 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 Ti 448		210 Watts
	Difference: 85 Watts (68%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X is 11% faster than the GeForce GTX 560 Ti 448 overall, due to its greater bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 560 Ti 448		144000 MB/sec
	Difference: 16000 (11%)

Texel Rate

The Radeon R9 M390X will be a lot (approximately 126%) better at texture filtering than the GeForce GTX 560 Ti 448. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 51552 (126%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 560 Ti 448 is the winner, and very much so. (explain)

GeForce GTX 560 Ti 448		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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at 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 that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.