Le Magnanime was originally a 74-gun ship of the line of the French Navy launched in 1744 at Rochefort. Captured on 12 January 1748, she was taken into Royal Navy service as the third rate HMS "Magnanime". She played a major part in the 1757 Rochefort expedition, helping to silence the batteries on the Isle of Aix, and served at the Battle of Quiberon Bay in 1759 under Lord Howe, where she forced the surrender of the French 74-gun . Following a survey in 1770, she was deemed unseaworthy and was broken up in 1775.