Radeon HD 6750 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 uses a 64-bit bus, and makes use of a 28 nm design. It features 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6750 should in theory perform a lot faster than the Radeon R5 M255 in general. (explain)

Radeon HD 6750		64000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 48000 (300%)

Texel Rate

The Radeon HD 6750 is a lot (more or less 39%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 7300 (39%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6750 is superior to the Radeon R5 M255, and very much so. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 4080 (54%)

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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface 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 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.