Radeon R9 M280X vs Radeon R9 M375X

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M280X should be 22% quicker than the Radeon R9 M375X overall, due to its higher data rate. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 16000 (22%)

Texel Rate

The Radeon R9 M280X will be a lot (about 24%) better at texture filtering than the Radeon R9 M375X. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 9800 (24%)

Pixel Rate

The Radeon R9 M375X will be a bit (approximately 13%) more effective at full screen anti-aliasing than the Radeon R9 M280X, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M375X		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 (measured in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.