Geforce GTX 1080 Ti vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which comes with a core clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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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

Theoretically speaking, the Geforce GTX 1080 Ti should be 210% quicker than the Radeon R9 M390X overall, due to its greater bandwidth. (explain)

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

Texel Rate

The Geforce GTX 1080 Ti is quite a bit (approximately 258%) faster with regards to texture 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

The Geforce GTX 1080 Ti should be a lot (more or less 463%) faster with regards to anti-aliasing than the Radeon R9 M390X, and will be capable of handling higher resolutions more effectively. (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 max amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 can be processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.