Radeon HD 4870 512MB vs Radeon RX 560

Intro

Compare those specifications to the Radeon RX 560, which features core clock speeds of 1175 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 1024 SPUs as well as 64 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon HD 4870 512MB		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

In theory, the Radeon HD 4870 512MB will be 0% faster than the Radeon RX 560 in general, because of its higher bandwidth. (explain)

Radeon HD 4870 512MB		115200 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 512 (0%)

Texel Rate

The Radeon RX 560 is quite a bit (about 151%) better at anisotropic filtering than the Radeon HD 4870 512MB. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 45200 (151%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 560 is superior to the Radeon HD 4870 512MB, by far. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 6800 (57%)

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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.