Radeon HD 5750 1GB vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which comes with a clock speed of 940 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit memory bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 5750 1GB should perform quite a bit faster than the Radeon R5 M255 in general. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 57600 (360%)

Texel Rate

The Radeon HD 5750 1GB is much (approximately 34%) better at texture filtering than the Radeon R5 M255. (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 6400 (34%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5750 1GB is the winner, by far. (explain)

Radeon HD 5750 1GB		11200 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 3680 (49%)

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 over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, 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 amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.