Radeon R9 390 8G vs Radeon R9 M380

Intro

Compare that to the Radeon R9 M380, which features GPU clock speed of 1000 MHz, and 4096 MB of GDDR5 RAM running at 1500 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be much better than the Radeon R9 M380 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 288000 (300%)

Texel Rate

The Radeon R9 390 8G will be quite a bit (more or less 300%) faster with regards to texture filtering than the Radeon R9 M380. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 120000 (300%)

Pixel Rate

The Radeon R9 390 8G is much (approximately 300%) more effective at anti-aliasing than the Radeon R9 M380, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 48000 (300%)

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 maximum amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.