Radeon R9 M290X vs Radeon R9 M375X

Intro

Compare those specs to the Radeon R9 M375X, which makes use of a 28 nm design. AMD has clocked the core frequency at 1015 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M290X, in theory, should be a lot faster than the Radeon R9 M375X in general. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon R9 M290X is much (about 67%) more effective at texture filtering than the Radeon R9 M375X. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 27400 (67%)

Pixel Rate

The Radeon R9 M290X is much (about 67%) better at full screen anti-aliasing than the Radeon R9 M375X, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 10960 (67%)

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 information (counted in MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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