The most expensive CPU cooler we've ever tested. We've been impressed with a couple of air coolers this past week - be quiet!'s Dark Rock Slim and Noctua's NH-U12A have both earned rave reviews - but if you have your heart set on an all-in-one liquid solution, what's the best the industry has to offer?

If price is any indication of quality, the award would have to go to the Asus ROG Ryujin 360, a £232 cooler that headlines Asus's foray into the world of all-in-ones and promises to be "the ultimate thermal solution."