Radeon R9 270X vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which comes with core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Radeon R9 270X		180 Watts
	Difference: 55 Watts (44%)

Memory Bandwidth

The Radeon R9 270X should in theory be a little bit faster than the Radeon R9 M395X in general. (explain)

Radeon R9 270X		179200 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 19200 (12%)

Texel Rate

The Radeon R9 M395X is a little bit (approximately 16%) faster with regards to anisotropic filtering than the Radeon R9 270X. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon R9 270X		80000 Mtexels/sec
	Difference: 12544 (16%)

Pixel Rate

The Radeon R9 270X should be a lot (approximately 38%) faster with regards to anti-aliasing than the Radeon R9 M395X, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 8864 (38%)

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 largest amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, 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 video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.