CORSAIR RM850x Modular ATX PSU - 850 W

Good to know - Keep it clean - this Corsair PSU is fully modular, so you can connect just the cables you need - The 850 W power output is enough for high-end gaming setups - Industry graded 105°C-rated capacitors mean consistent and dependable electrical performance - Rated 80 Plus Gold, you can expect lower power consumption, less noise and cooler temperatures - The 135 mm fan with magnetic levitation bearing and a Zero RPM mode, so you probably won't hear it at all -  It keeps your PC safe with a whole bunch of protection standards so you can rest easy

Price: 189.99 from Currys IE