Radeon R9 280X vs Radeon R9 M280X

Intro

Compare all of that to the Radeon R9 M280X, which uses a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM runs at a speed of 1375 MHz on this specific card. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R9 280X		250 Watts
	Difference: 175 Watts (233%)

Memory Bandwidth

In theory, the Radeon R9 280X should be much faster than the Radeon R9 M280X overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 200000 (227%)

Texel Rate

The Radeon R9 280X will be a lot (approximately 116%) faster with regards to AF than the Radeon R9 M280X. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 58400 (116%)

Pixel Rate

The Radeon R9 280X is quite a bit (more or less 89%) more effective at FSAA than the Radeon R9 M280X, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 12800 (89%)

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 largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.