Radeon HD 4890 1GB vs Radeon RX 560

Intro

Compare all that to the Radeon RX 560, which features a clock frequency of 1175 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 128-bit bus, and makes use of a 14 nm design. It is made up of 1024 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon HD 4890 1GB		190 Watts
	Difference: 110 Watts (138%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4890 1GB should perform a bit faster than the Radeon RX 560 overall. (explain)

Radeon HD 4890 1GB		124800 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 10112 (9%)

Texel Rate

The Radeon RX 560 is much (about 88%) faster with regards to anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 35200 (88%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 560 is a better choice, but it probably won't make a huge difference. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 4890 1GB		16000 Mpixels/sec
	Difference: 2800 (18%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the 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 write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.