Radeon R9 M390X vs Radeon RX 470 4GB

Intro

Compare that to the Radeon RX 470 4GB, which features GPU clock speed of 926 MHz, and 4096 MB of GDDR5 RAM running at 1650 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB		120 Watts
Radeon R9 M390X		125 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

The Radeon RX 470 4GB, in theory, should perform quite a bit faster than the Radeon R9 M390X in general. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 51200 (32%)

Texel Rate

The Radeon RX 470 4GB should be quite a bit (about 28%) more effective at texture filtering than the Radeon R9 M390X. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 25984 (28%)

Pixel Rate

The Radeon RX 470 4GB is much (approximately 28%) faster with regards to anti-aliasing than the Radeon R9 M390X, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 6496 (28%)

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 information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.