Radeon R9 M385X vs Radeon R9 M395X

Intro

Compare all that to the Radeon R9 M395X, which has a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M395X should in theory perform much faster than the Radeon R9 M385X overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 64000 (67%)

Texel Rate

The Radeon R9 M395X will be a lot (about 50%) more effective at anisotropic filtering than the Radeon R9 M385X. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 30944 (50%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M395X is the winner, by far. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 5536 (31%)

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 megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.