Radeon HD 4850 X2 1GB vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which comes with GPU core speed of 1175 MHz, and 4096 MB of GDDR5 memory set to run at 1750 MHz through a 128-bit bus. It also is made up of 1024 Stream Processors, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon HD 4850 X2 1GB		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

The Radeon HD 4850 X2 1GB should in theory be just a bit faster than the Radeon RX 560 in general. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 12416 (11%)

Texel Rate

The Radeon RX 560 will be a lot (approximately 50%) faster with regards to AF than the Radeon HD 4850 X2 1GB. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 4850 X2 1GB		50000 Mtexels/sec
	Difference: 25200 (50%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4850 X2 1GB is the winner, but only just. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 1200 (6%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.