With both teams not performing to expectations, especially Newcastle whose fans had expected more than their recent six straight defeats, both managers needed to get a good performance, and result, from their sides.
United legend Ole Gunnar Solskjaer has struggled since taking the reins back in January and his side looked certain to be relegated back to the Championship after only one season in the top flight.
Newcastle manager Alan Pardew was back in the dugout after a lengthy ban to see Shola Ameobi put his team in front from a free header in the 18th minute.
The Magpies were in complete control of the match and even a somewhat minor walkout at the 69th minute by some Newcastle supporters in protest against the owner and manager failed to distract them.
Cardiff were unable to take their chances and Newcastle punished them scoring twice more to end the game 3-0.
Failure to take any points means the Bluebirds are officially relegated along with Fulham.