GeForce GTX 980 Ti vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which features a clock speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is comprised 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

As far as performance goes, the GeForce GTX 980 Ti should theoretically be a lot superior to the Radeon R9 M395X overall. (explain)

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

Texel Rate

The GeForce GTX 980 Ti should be much (about 90%) better at AF 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 is quite a bit (approximately 315%) more effective at full screen anti-aliasing than the Radeon R9 M395X, and capable of handling higher resolutions without losing too much performance. (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 (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 reach the max fill rate.