Radeon R9 M380 vs Radeon RX 480

Intro

Compare those specs to the Radeon RX 480, which comes with a core clock speed of 1120 MHz and a GDDR5 memory speed of 2000 MHz. It also uses a 256-bit memory bus, and uses a 14 nm design. It features 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon RX 480 should in theory be a lot faster than the Radeon R9 M380 in general. (explain)

Radeon RX 480		262144 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 166144 (173%)

Texel Rate

The Radeon RX 480 should be a lot (more or less 303%) better at AF than the Radeon R9 M380. (explain)

Radeon RX 480		161280 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 121280 (303%)

Pixel Rate

The Radeon RX 480 will be much (about 124%) more effective at AA than the Radeon R9 M380, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 480		35840 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 19840 (124%)

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 (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.