KitGuru tried the Sapphire R9 390X Tri-X 8GB
A quote from the article:
Today we take a look at one of the latest graphics cards from Sapphire ? the new R9 390X featuring the latest version of their Tri-X cooling system. This top level graphics card ships in an overclocked state and features a custom triple cooler ? shipping with 3x 90mm dual ball bearing fans. This card is designed to target the 4K market ? priced at £359.99 inc vat (https://www.overclockers.co.uk/showproduct.php?prodid=GX-361-SP) in the UK.Sapphire R9 390X Tri-X 8GB Review @ KitGuru