Radeon R9 270 vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which has a GPU core clock speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon R9 270		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

In theory, the Radeon R9 270 is 2% faster than the Radeon R9 M295X in general, due to its greater bandwidth. (explain)

Radeon R9 270		179200 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 3200 (2%)

Texel Rate

The Radeon R9 M295X is much (more or less 33%) more effective at AF than the Radeon R9 270. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 24000 (33%)

Pixel Rate

The Radeon R9 270 is a bit (approximately 20%) more effective at anti-aliasing than the Radeon R9 M295X, and will be able to handle higher resolutions while still performing well. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 4800 (20%)

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 (measured in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.