GeForce GTX 460 SE vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which features a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation 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

Performance-wise, the Radeon R9 M390X should in theory be much superior to the GeForce GTX 460 SE overall. (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 (more or less 197%) faster with regards to 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 high levels of AA is important to you, then the Radeon R9 M390X is the winner, but it probably won't make a huge difference. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its 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 - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.