Radeon R9 380 4G vs Radeon R9 M270X

Intro

Compare those specs 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 as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 380 4G should in theory be quite a bit 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 is much (about 275%) better at texture 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

If using a high resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon R9 M270X, by far. (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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.