Radeon R9 270X vs Radeon R9 M280X

Intro

Compare all that to the Radeon R9 M280X, which makes use of a 28 nm design. AMD has clocked the core frequency at 900 MHz. The GDDR5 memory is set to run at a speed of 1375 MHz on this card. It features 896 SPUs as well as 56 Texture Address Units 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 270X		180 Watts
	Difference: 105 Watts (140%)

Memory Bandwidth

Theoretically, the Radeon R9 270X should be a lot faster than the Radeon R9 M280X overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 91200 (104%)

Texel Rate

The Radeon R9 270X is a lot (about 59%) faster with regards to AF than the Radeon R9 M280X. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 29600 (59%)

Pixel Rate

The Radeon R9 270X will be much (more or less 122%) faster with regards to FSAA than the Radeon R9 M280X, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 17600 (122%)

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 data (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.