Geforce GTX 1080 Ti vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which comes with core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units 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 1080 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 1080 Ti is 210% faster than the Radeon R9 M395X overall, because of its higher data rate. (explain)

Geforce GTX 1080 Ti		495616 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 335616 (210%)

Texel Rate

The Geforce GTX 1080 Ti is a lot (about 258%) better at texture filtering than the Radeon R9 M395X. (explain)

Geforce GTX 1080 Ti		331520 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 238976 (258%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 1080 Ti is the winner, and very much so. (explain)

Geforce GTX 1080 Ti		130240 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 107104 (463%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses 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, High Dynamic Range and high resolutions.

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

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