The HCG GOLD 850W is the 80 PLUS Gold Fully Modular PSU and best 850w power supply with 120mm FDB Fan/LLC + DC to DC Design/Full Japanese Caps/10-Year Warranty - Antec
Seasonic Focus GX 850 80+ GOLD 850W Full Modular QUIET PSU/Power Supply with Fanless Mode LN100739 - Focus GX-850 | SCAN UK
GameMax GX-850W Pro 850 Watts Fully Modular PSU
800w - 850W PSUs – Available Now at Overclockers UK