GeForce GTX 1080 vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which features clock speeds of 900 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
GeForce GTX 1080		180 Watts
	Difference: 105 Watts (140%)

Memory Bandwidth

The GeForce GTX 1080 should theoretically be quite a bit faster than the Radeon R9 M280X overall. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 239680 (272%)

Texel Rate

The GeForce GTX 1080 will be quite a bit (more or less 410%) better at anisotropic filtering than the Radeon R9 M280X. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 206720 (410%)

Pixel Rate

The GeForce GTX 1080 is quite a bit (more or less 614%) more effective at full screen anti-aliasing than the Radeon R9 M280X, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 88448 (614%)

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

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.