GeForce GTX 750 vs Radeon R5 M255

Intro

Compare all that to the Radeon R5 M255, which features a GPU core clock speed of 940 MHz, and 2048 MB of DDR3 RAM running at 1000 MHz through a 64-bit bus. It also features 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 750 should theoretically be much better than the Radeon R5 M255 overall. (explain)

GeForce GTX 750		80000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 64000 (400%)

Texel Rate

The GeForce GTX 750 is a lot (approximately 74%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 13840 (74%)

Pixel Rate

The GeForce GTX 750 should be quite a bit (approximately 117%) faster with regards to full screen anti-aliasing than the Radeon R5 M255, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 8800 (117%)

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 data (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses 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 amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.