Radeon R9 M390X vs Radeon RX 460

Intro

Compare all that to the Radeon RX 460, which features GPU core speed of 1090 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also is comprised 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		75 Watts
Radeon R9 M390X		125 Watts
	Difference: 50 Watts (67%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be 43% quicker than the Radeon RX 460 overall, because of its higher data rate. (explain)

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

Texel Rate

The Radeon R9 M390X will be a lot (approximately 52%) faster with regards to anisotropic filtering than the Radeon RX 460. (explain)

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

Pixel Rate

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

Radeon R9 M390X		23136 Mpixels/sec
Radeon RX 460		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 largest amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 can be applied in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.