GeForce GTX 560 Ti 448 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which has a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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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

As far as performance goes, the Radeon R9 M390X should theoretically be just a bit superior to the GeForce GTX 560 Ti 448 in general. (explain)

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

Texel Rate

The Radeon R9 M390X is a lot (about 126%) more effective at anisotropic 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 lots of anti-aliasing is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon R9 M390X, by far. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.