Radeon HD 4870 512MB vs Radeon RX 560

Intro

Compare those specifications to the Radeon RX 560, which has core clock speeds of 1175 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. 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 4870 512MB		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 512MB will be 0% quicker than the Radeon RX 560 overall, due to 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 will be quite a bit (more or less 151%) more effective at AF 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

The Radeon RX 560 should be a lot (more or less 57%) better at anti-aliasing than the Radeon HD 4870 512MB, and should be capable of handling higher screen resolutions more effectively. (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: Bandwidth is the max amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.