GeForce GTX 460 2GB vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which comes with clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 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 2GB		160 Watts
	Difference: 35 Watts (28%)

Memory Bandwidth

In theory, the Radeon R9 M395X should be much faster than the GeForce GTX 460 2GB overall. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 460 2GB		115200 MB/sec
	Difference: 44800 (39%)

Texel Rate

The Radeon R9 M395X is a lot (approximately 145%) more effective at AF than the GeForce GTX 460 2GB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 460 2GB		37800 Mtexels/sec
	Difference: 54744 (145%)

Pixel Rate

The Radeon R9 M395X is just a bit (approximately 7%) more effective at FSAA than the GeForce GTX 460 2GB, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GTX 460 2GB		21600 Mpixels/sec
	Difference: 1536 (7%)

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 information (counted in MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, 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 figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.