Radeon R9 M370X vs Radeon R9 M380

Intro

Compare those specifications to the Radeon R9 M380, which comes with GPU core speed of 1000 MHz, and 4096 MB of GDDR5 memory running at 1500 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M380 should perform quite a bit faster than the Radeon R9 M370X in general. (explain)

Radeon R9 M380		96000 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 24000 (33%)

Texel Rate

The Radeon R9 M380 will be a lot (about 25%) better at texture filtering than the Radeon R9 M370X. (explain)

Radeon R9 M380		40000 Mtexels/sec
Radeon R9 M370X		32000 Mtexels/sec
	Difference: 8000 (25%)

Pixel Rate

The Radeon R9 M380 will be a lot (about 25%) better at AA than the Radeon R9 M370X, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M380		16000 Mpixels/sec
Radeon R9 M370X		12800 Mpixels/sec
	Difference: 3200 (25%)

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 maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 are processed per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.