GeForce GTX 980 vs Radeon R9 M265X

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 980 should in theory be quite a bit superior to the Radeon R9 M265X in general. (explain)

GeForce GTX 980		224000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 152000 (211%)

Texel Rate

The GeForce GTX 980 is much (more or less 527%) faster with regards to anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX 980		144128 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 121128 (527%)

Pixel Rate

The GeForce GTX 980 should be much (more or less 683%) faster with regards to AA than the Radeon R9 M265X, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980		72064 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 62864 (683%)

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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.