GeForce GTX 460 (OEM) vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which has GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should in theory be much better than the GeForce GTX 460 (OEM) overall. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 460 (OEM)		108800 MB/sec
	Difference: 51200 (47%)

Texel Rate

The Radeon R9 M395X will be quite a bit (about 154%) more effective at texture filtering than the GeForce GTX 460 (OEM). (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 56144 (154%)

Pixel Rate

The Radeon R9 M395X will be a bit (more or less 11%) faster with regards to FSAA than the GeForce GTX 460 (OEM), and also should be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M395X		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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at 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 the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.