GeForce GTX 780 Ti vs Radeon R9 M270X

Intro

Compare all that to the Radeon R9 M270X, which comes with clock speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 780 Ti is 367% quicker than the Radeon R9 M270X overall, because of its greater data rate. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 264000 (367%)

Texel Rate

The GeForce GTX 780 Ti should be much (more or less 624%) better at texture filtering than the Radeon R9 M270X. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 181000 (624%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 780 Ti is a better choice, and very much so. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 30400 (262%)

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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.