Radeon HD 5830 vs Radeon R5 M255

Intro

Compare all that to the Radeon R5 M255, which has a core 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 is comprised of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 5830 should in theory be a lot superior to the Radeon R5 M255 in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 112000 (700%)

Texel Rate

The Radeon HD 5830 will be quite a bit (more or less 138%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 26000 (138%)

Pixel Rate

The Radeon HD 5830 is much (approximately 70%) faster with regards to AA than the Radeon R5 M255, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 5280 (70%)

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 max amount of information (counted in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at 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 the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.