GeForce GTX 1080 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this specific model. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 1080		180 Watts
	Difference: 55 Watts (44%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 1080 should theoretically be much better than the Radeon R9 M395X overall. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 167680 (105%)

Texel Rate

The GeForce GTX 1080 will be much (more or less 178%) faster with regards to AF than the Radeon R9 M395X. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 164576 (178%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 1080 is a better choice, by far. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 79712 (345%)

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 moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.