Geforce GTX 1080 Ti vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Geforce GTX 1080 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Performance-wise, the Geforce GTX 1080 Ti should theoretically be a lot superior to the Radeon R9 M390X overall. (explain)

Geforce GTX 1080 Ti		495616 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 335616 (210%)

Texel Rate

The Geforce GTX 1080 Ti should be much (about 258%) more effective at anisotropic filtering than the Radeon R9 M390X. (explain)

Geforce GTX 1080 Ti		331520 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 238976 (258%)

Pixel Rate

If running with lots of anti-aliasing 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 M390X		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: Bandwidth is the largest amount of information (counted in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.