GeForce GTX 460 (OEM) vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which features GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, 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 (OEM)		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

The Radeon R9 M390X should in theory be quite a bit faster than the GeForce GTX 460 (OEM) overall. (explain)

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

Texel Rate

The Radeon R9 M390X will be quite a bit (more or less 154%) better at texture filtering than the GeForce GTX 460 (OEM). (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 56144 (154%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M390X is the winner, not by a very large margin though. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 460 (OEM)		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 largest amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.