GeForce GTX 980 Ti vs Radeon R9 M265X

Intro

Compare all that to the Radeon R9 M265X, which comes with a clock frequency of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 980 Ti should in theory be quite a bit better than the Radeon R9 M265X in general. (explain)

GeForce GTX 980 Ti		336000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 264000 (367%)

Texel Rate

The GeForce GTX 980 Ti is a lot (more or less 665%) faster with regards to texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 153000 (665%)

Pixel Rate

The GeForce GTX 980 Ti should be a lot (more or less 943%) better at AA than the Radeon R9 M265X, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 86800 (943%)

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 largest amount of data (counted in MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of 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 one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.