Radeon R9 380X vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with core clock speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 memory. 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 M295X		125 Watts
Radeon R9 380X		190 Watts
	Difference: 65 Watts (52%)

Memory Bandwidth

Theoretically, the Radeon R9 380X should be just a bit faster than the Radeon R9 M295X in general. (explain)

Radeon R9 380X		182400 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 6400 (4%)

Texel Rate

The Radeon R9 380X should be a lot (about 29%) faster with regards to AF than the Radeon R9 M295X. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 28160 (29%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 380X is a better choice, by a large margin. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 7040 (29%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 can be processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, 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 record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.