Radeon R9 270 vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which comes with a GPU core clock speed of 900 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 128-bit bus. It also features 896 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R9 270		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 should be 104% quicker than the Radeon R9 M280X overall, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 270 should be a lot (more or less 43%) faster with regards to texture filtering than the Radeon R9 M280X. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 21600 (43%)

Pixel Rate

The Radeon R9 270 will be a lot (about 100%) faster with regards to anti-aliasing than the Radeon R9 M280X, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 14400 (100%)

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 information (counted in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can 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 Render Output Units 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.