GeForce GTX 980 Ti vs Radeon R9 M395X

Intro

Compare all that to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 980 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980 Ti is 110% faster than the Radeon R9 M395X overall, due to its higher bandwidth. (explain)

GeForce GTX 980 Ti		336000 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 176000 (110%)

Texel Rate

The GeForce GTX 980 Ti is much (about 90%) faster with regards to anisotropic filtering than the Radeon R9 M395X. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 83456 (90%)

Pixel Rate

The GeForce GTX 980 Ti should be quite a bit (about 315%) faster with regards to FSAA than the Radeon R9 M395X, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 72864 (315%)

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 (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.