Radeon R9 380X vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which has core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units 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 380X		190 Watts
	Difference: 65 Watts (52%)

Memory Bandwidth

The Radeon R9 380X, in theory, should perform a little bit faster than the Radeon R9 M395X in general. (explain)

Radeon R9 380X		182400 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 22400 (14%)

Texel Rate

The Radeon R9 380X should be a lot (about 34%) better at texture filtering than the Radeon R9 M395X. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 31616 (34%)

Pixel Rate

The Radeon R9 380X will be a lot (more or less 34%) more effective at AA than the Radeon R9 M395X, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 7904 (34%)

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 data (in units of MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.