Radeon HD 4890 2GB vs Radeon RX 560

Intro

Compare that to the Radeon RX 560, which features a clock speed of 1175 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 128-bit memory bus, and uses 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 2GB		190 Watts
	Difference: 110 Watts (138%)

Memory Bandwidth

Performance-wise, the Radeon HD 4890 2GB should in theory be just a bit better than the Radeon RX 560 overall. (explain)

Radeon HD 4890 2GB		124800 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 10112 (9%)

Texel Rate

The Radeon RX 560 should be a lot (more or less 88%) better at texture filtering than the Radeon HD 4890 2GB. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 4890 2GB		40000 Mtexels/sec
	Difference: 35200 (88%)

Pixel Rate

The Radeon RX 560 will be a small bit (more or less 18%) more effective at FSAA than the Radeon HD 4890 2GB, and should be able to handle higher resolutions more effectively. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 4890 2GB		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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.