Radeon R9 M390X vs Radeon RX 460 2GB

Intro

Compare all that to the Radeon RX 460 2GB, which features GPU clock speed of 1090 MHz, and 2048 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon R9 M390X		125 Watts
	Difference: 50 Watts (67%)

Memory Bandwidth

In theory, the Radeon R9 M390X should perform much faster than the Radeon RX 460 2GB in general. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 48000 (43%)

Texel Rate

The Radeon R9 M390X should be a lot (approximately 52%) faster with regards to AF than the Radeon RX 460 2GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon RX 460 2GB		61040 Mtexels/sec
	Difference: 31504 (52%)

Pixel Rate

The Radeon R9 M390X will be quite a bit (more or less 33%) better at AA than the Radeon RX 460 2GB, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon RX 460 2GB		17440 Mpixels/sec
	Difference: 5696 (33%)

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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.