Radeon HD 4870 X2 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 frequency at 1175 MHz. The GDDR5 RAM runs at a frequency of 1750 MHz on this model. It features 1024 SPUs as well as 64 TAUs 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 4870 X2		350 Watts
	Difference: 270 Watts (338%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 should be 101% quicker than the Radeon RX 560 overall, due to its higher bandwidth. (explain)

Radeon HD 4870 X2		230400 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 115712 (101%)

Texel Rate

The Radeon RX 560 will be a lot (about 25%) more effective at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 15200 (25%)

Pixel Rate

The Radeon HD 4870 X2 will be a lot (about 28%) better at anti-aliasing than the Radeon RX 560, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 4870 X2		24000 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 5200 (28%)

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 largest amount of information (measured in MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.