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 frequency 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 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 5830 should in theory perform quite a bit faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The Radeon HD 5830 should be much (about 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

If running with lots of anti-aliasing is important to you, then the Radeon HD 5830 is the winner, by far. (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: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.