Geforce GTX 780 vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which makes use of a 28 nm design. AMD has clocked the core frequency at 575 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this specific card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Geforce GTX 780 should perform quite a bit faster than the Radeon R9 M265X overall. (explain)

Geforce GTX 780		288384 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 216384 (301%)

Texel Rate

The Geforce GTX 780 will be much (approximately 620%) faster with regards to anisotropic filtering than the Radeon R9 M265X. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 142696 (620%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 780 is a better choice, by a large margin. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 32224 (350%)

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 maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 can be applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.