Radeon R9 285 vs Radeon R9 M375X

Intro

Compare those specs to the Radeon R9 M375X, which comes with clock speeds of 1015 MHz on the GPU, and 1125 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 285 should perform quite a bit faster than the Radeon R9 M375X overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon R9 285 will be much (about 153%) better at texture filtering than the Radeon R9 M375X. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 62216 (153%)

Pixel Rate

The Radeon R9 285 will be much (more or less 81%) better at FSAA than the Radeon R9 M375X, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 13136 (81%)

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 information (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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