Radeon R9 M265X vs Radeon RX 470

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon RX 470 should be 193% faster than the Radeon R9 M265X in general, due to its greater bandwidth. (explain)

Radeon RX 470		211200 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 139200 (193%)

Texel Rate

The Radeon RX 470 should be a lot (more or less 415%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 95528 (415%)

Pixel Rate

The Radeon RX 470 is quite a bit (approximately 222%) more effective at full screen anti-aliasing than the Radeon R9 M265X, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 20432 (222%)

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 information (measured in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 processed per 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.