Radeon R9 380 4G vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which comes with core speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G should perform a lot faster than the Radeon R9 M270X in general. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 110400 (153%)

Texel Rate

The Radeon R9 380 4G will be much (more or less 275%) more effective at anisotropic filtering than the Radeon R9 M270X. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 79640 (275%)

Pixel Rate

The Radeon R9 380 4G should be much (more or less 168%) more effective at FSAA than the Radeon R9 M270X, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 19440 (168%)

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 max amount of information (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at 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 card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.