Radeon R9 285 vs Radeon R9 M375

Intro

Compare all that to the Radeon R9 M375, which has a clock frequency of 1015 MHz and a DDR3 memory frequency of 1100 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 285, in theory, should be a lot faster than the Radeon R9 M375 overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 140800 (400%)

Texel Rate

The Radeon R9 285 is a lot (about 153%) faster with regards to texture filtering than the Radeon R9 M375. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 62216 (153%)

Pixel Rate

The Radeon R9 285 is much (approximately 81%) better at AA than the Radeon R9 M375, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R9 M375		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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's 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 higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to 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 potential to get to the maximum fill rate.