Geforce GTX 1080 Ti vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which makes use of a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory works at a speed of 1250 MHz on this card. 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 1080 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 1080 Ti should be a lot faster than the Radeon R9 M395X in general. (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 quite a bit (more or less 258%) faster with regards to anisotropic 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 lots of anti-aliasing is important to you, then the Geforce GTX 1080 Ti is a better choice, by a large margin. (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 largest amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.