Radeon R5 M255 vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which features a core clock frequency of 1015 MHz and a DDR3 memory frequency of 1100 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M375 should theoretically be much faster than the Radeon R5 M255 overall. (explain)

Radeon R9 M375		35200 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 19200 (120%)

Texel Rate

The Radeon R9 M375 will be much (more or less 116%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 21800 (116%)

Pixel Rate

The Radeon R9 M375 should be a lot (more or less 116%) faster with regards to anti-aliasing than the Radeon R5 M255, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 8720 (116%)

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 data (measured in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics 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 amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 reach the max fill rate.