GeForce GTX Titan X vs Radeon R5 M255

Intro

Compare all of that to the Radeon R5 M255, which has a clock frequency of 940 MHz and a DDR3 memory speed of 1000 MHz. It also makes use of a 64-bit memory bus, and uses a 28 nm design. It is comprised of 320 SPUs, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX Titan X should in theory perform a lot faster than the Radeon R5 M255 overall. (explain)

GeForce GTX Titan X		336000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 320000 (2000%)

Texel Rate

The GeForce GTX Titan X is a lot (about 921%) faster with regards to AF than the Radeon R5 M255. (explain)

GeForce GTX Titan X		192000 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 173200 (921%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX Titan X is superior to the Radeon R5 M255, by a large margin. (explain)

GeForce GTX Titan X		96000 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 88480 (1177%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.