Radeon R9 270 vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which has clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Radeon R9 270		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

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

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

Texel Rate

The Radeon R9 M395X is quite a bit (about 29%) more effective at AF than the Radeon R9 270. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 20544 (29%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 270 is superior to the Radeon R9 M395X, and very much so. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 5664 (24%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock 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 also depends 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 max fill rate.