Radeon R9 M280X vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which uses a 28 nm design. AMD has clocked the core speed at 1015 MHz. The DDR3 RAM runs at a speed of 1100 MHz on this card. 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

In theory, the Radeon R9 M280X should be 150% faster than the Radeon R9 M375 overall, due to its higher data rate. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 52800 (150%)

Texel Rate

The Radeon R9 M280X should be a lot (more or less 24%) better at texture filtering than the Radeon R9 M375. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 9800 (24%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 M375 is superior to the Radeon R9 M280X, but not by far. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 1840 (13%)

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 information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 are applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.