Radeon R9 380 4G vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which features core clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 380 4G should in theory be a lot superior to the Radeon R9 M385X overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 86400 (90%)

Texel Rate

The Radeon R9 380 4G should be a lot (approximately 76%) faster with regards to texture filtering than the Radeon R9 M385X. (explain)

Radeon R9 380 4G		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 4G is the winner, by far. (explain)

Radeon R9 380 4G		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: Bandwidth is the max amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 can be processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.