GeForce GTX Titan Black vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which comes with core speeds of 750 MHz on the GPU, and 1375 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 M295X		125 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

In theory, the GeForce GTX Titan Black should perform a lot faster than the Radeon R9 M295X overall. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 160000 (91%)

Texel Rate

The GeForce GTX Titan Black should be much (approximately 122%) better at texture filtering than the Radeon R9 M295X. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 117360 (122%)

Pixel Rate

The GeForce GTX Titan Black should be a lot (more or less 78%) faster with regards to anti-aliasing than the Radeon R9 M295X, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 18672 (78%)

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 max amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.