Radeon R9 M265X vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which comes with GPU core speed of 1120 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon RX 480 4GB should in theory be much faster than the Radeon R9 M265X in general. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 157376 (219%)

Texel Rate

The Radeon RX 480 4GB is much (approximately 601%) more effective at texture filtering than the Radeon R9 M265X. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 138280 (601%)

Pixel Rate

The Radeon RX 480 4GB is much (approximately 290%) more effective at AA than the Radeon R9 M265X, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 26640 (290%)

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 data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.