Radeon HD 4850 X2 1GB vs Radeon RX 560

Intro

Compare those specifications to the Radeon RX 560, which makes use of a 14 nm design. AMD has set the core speed at 1175 MHz. The GDDR5 RAM runs at a frequency of 1750 MHz on this specific card. It features 1024 SPUs as well as 64 Texture Address Units and 16 ROPs.

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

Performance-wise, the Radeon HD 4850 X2 1GB should in theory be a little bit better 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 should 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

The Radeon HD 4850 X2 1GB should be a small bit (approximately 6%) better at full screen anti-aliasing than the Radeon RX 560, and also should be capable of handling higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's 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 higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.