Radeon R9 M280X vs Radeon R9 M365X

Intro

Compare those specs to the Radeon R9 M365X, which comes with a core clock frequency of 925 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M280X will be 22% quicker than the Radeon R9 M365X in general, due to its higher bandwidth. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R9 M365X		72000 MB/sec
	Difference: 16000 (22%)

Texel Rate

The Radeon R9 M280X will be a lot (about 36%) faster with regards to texture filtering than the Radeon R9 M365X. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R9 M365X		37000 Mtexels/sec
	Difference: 13400 (36%)

Pixel Rate

The Radeon R9 M365X is a bit (approximately 3%) more effective at AA than the Radeon R9 M280X, and capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 M365X		14800 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 400 (3%)

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 information (counted in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 per second. This number is worked out by multiplying the total texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. 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 is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.