GeForce GTX 460 SE vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features core 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 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 460 SE		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X is 47% quicker than the GeForce GTX 460 SE in general, because of its higher data rate. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 460 SE		108800 MB/sec
	Difference: 51200 (47%)

Texel Rate

The Radeon R9 M390X will be quite a bit (about 197%) better at AF than the GeForce GTX 460 SE. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 460 SE		31200 Mtexels/sec
	Difference: 61344 (197%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M390X is the winner, though only just barely. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 460 SE		20800 Mpixels/sec
	Difference: 2336 (11%)

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 maximum amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the 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 in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.