Radeon R9 380 2G vs Radeon R9 M385X

Intro

Compare all that to the Radeon R9 M385X, which features a GPU core clock speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also features 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G should be quite a bit faster than the Radeon R9 M385X in general. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 86400 (90%)

Texel Rate

The Radeon R9 380 2G should be much (more or less 76%) faster with regards to texture filtering than the Radeon R9 M385X. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 47040 (76%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 380 2G is superior to the Radeon R9 M385X, by a large margin. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 13440 (76%)

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 data (measured in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics 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 amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.