Radeon HD 3470 512MB vs Radeon R5 M255

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3470 512MB should theoretically be quite a bit faster than the Radeon R5 M255 in general. (explain)

Radeon HD 3470 512MB		30400 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 14400 (90%)

Texel Rate

The Radeon R5 M255 will be much (about 488%) better at texture filtering than the Radeon HD 3470 512MB. (explain)

Radeon R5 M255		18800 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 15600 (488%)

Pixel Rate

The Radeon R5 M255 will be a lot (more or less 135%) faster with regards to anti-aliasing than the Radeon HD 3470 512MB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon R5 M255		7520 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 4320 (135%)

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 moved across the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.