Radeon R9 285 vs Radeon R9 M375X

Intro

Compare that to the Radeon R9 M375X, which has a core clock speed of 1015 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 285 should be 144% faster than the Radeon R9 M375X in general, due to its higher data rate. (explain)

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

Texel Rate

The Radeon R9 285 is quite a bit (approximately 153%) more effective at AF than the Radeon R9 M375X. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 285 is a better choice, by a large margin. (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 max amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 maximum fill rate.