GeForce GTX Titan Black vs Radeon R5 M255

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX Titan Black is 2000% quicker than the Radeon R5 M255 in general, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTX Titan Black will be quite a bit (more or less 1035%) more effective at texture filtering than the Radeon R5 M255. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 194560 (1035%)

Pixel Rate

The GeForce GTX Titan Black should be much (more or less 467%) faster with regards to full screen anti-aliasing than the Radeon R5 M255, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 35152 (467%)

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 (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.