Radeon R9 M385X vs Radeon RX 470

Intro

Compare all of that to the Radeon RX 470, which comes with a GPU core clock speed of 926 MHz, and 8192 MB of GDDR5 RAM set to run at 1650 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 should be 120% faster than the Radeon R9 M385X in general, due to its greater data rate. (explain)

Radeon RX 470		211200 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 115200 (120%)

Texel Rate

The Radeon RX 470 is quite a bit (about 92%) better at anisotropic filtering than the Radeon R9 M385X. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 56928 (92%)

Pixel Rate

The Radeon RX 470 will be a lot (approximately 68%) better at full screen anti-aliasing than the Radeon R9 M385X, and capable of handling higher resolutions better. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 12032 (68%)

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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.