Radeon R9 380X vs Radeon R9 M375

Intro

Compare those specifications to the Radeon R9 M375, which comes with GPU clock speed of 1015 MHz, and 4096 MB of DDR3 RAM set to run at 1100 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 380X should theoretically be a lot better than the Radeon R9 M375 overall. (explain)

Radeon R9 380X		182400 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 147200 (418%)

Texel Rate

The Radeon R9 380X is much (about 206%) better at anisotropic filtering than the Radeon R9 M375. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 83560 (206%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 380X is superior to the Radeon R9 M375, and very much so. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 14800 (91%)

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 (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at 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 can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.