Radeon R9 M385X vs Radeon RX 470 4GB

Intro

Compare all of that to the Radeon RX 470 4GB, which features GPU core speed of 926 MHz, and 4096 MB of GDDR5 memory set to run 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

Memory Bandwidth

Performance-wise, the Radeon RX 470 4GB should theoretically be a lot better than the Radeon R9 M385X overall. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 115200 (120%)

Texel Rate

The Radeon RX 470 4GB will be quite a bit (about 92%) faster with regards to texture filtering than the Radeon R9 M385X. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 56928 (92%)

Pixel Rate

The Radeon RX 470 4GB will be a lot (about 68%) better at full screen anti-aliasing than the Radeon R9 M385X, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 470 4GB		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: Bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's 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 fill 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 ability to get to the maximum fill rate.