Radeon HD 7950 vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which features core speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 7950 should theoretically be much superior to the Radeon R5 M255 overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 224000 (1400%)

Texel Rate

The Radeon HD 7950 will be a lot (about 377%) better at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 70800 (377%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7950 is superior to the Radeon R5 M255, and very much so. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 18080 (240%)

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 largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.