Radeon R9 270 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which has a core clock frequency of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

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

The Radeon R9 270 should theoretically be a small bit faster than the Radeon R9 M295X in general. (explain)

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

Texel Rate

The Radeon R9 M295X is a lot (approximately 33%) faster with regards to anisotropic filtering 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 should be just a bit (approximately 20%) faster with regards to anti-aliasing than the Radeon R9 M295X, and also capable of handling higher screen resolutions more effectively. (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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be 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 higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.