Radeon R9 M375 vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which features GPU clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be 355% faster than the Radeon R9 M375 overall, because of its greater bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 124800 (355%)

Texel Rate

The Radeon R9 M390X should be a lot (approximately 128%) faster with regards to texture filtering than the Radeon R9 M375. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 51944 (128%)

Pixel Rate

The Radeon R9 M390X is quite a bit (approximately 42%) more effective at FSAA than the Radeon R9 M375, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 6896 (42%)

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 max amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.