Corsair RM850x 80 PLUS Gold, 850 Watts, Fully Modular ATX Power Supply Unit - Black

Product Information

STMicroelectronics STU6N65K3 (650V, 3A @ 100°C, 1.3mOhm), Infineon BSC0906NS (30V, 40A @ 100°C, 4.5 mOhm )

The ATX 3.0 standard demands a high level of reliability and power efficiency. While many CORSAIR PSUs meet these requirements, SF-L Series PSUs are formally certified for ATX 3.0 compliance. Completely modular cables means you only connect the cables your system needs, and the wide range of included cables adds broad compatibility with modern graphics cards and motherboards. There is only one +12V rail. It can deliver the unit's full power if needed. The minor rails are very strong with 150 W maximum combined power, and the 5VSB rail has the typical current output for a unit of this capacity. Electrolytics: Nippon Chemi-Con (105°C, W, KYB) 1x Chemi-Con (5VSB circuit, 5-6,000h @ 105°C, KZH) Polymers: FPCAP, Nippon Chemi-ConThe RM850 has all protection features, including OTP (Over Temperature Protection), which is essential in semi-passive units, especially if their maximum operating temperature is only 40°C. We find it pretty strange that Corsair rated their new RM units at only 40°C since all RM units feature a semi-passive operation, which will inevitably lead to increased operational temperatures. Primary side: Full-Bridge & LLC Resonant Converter Secondary side: Synchronous Rectification & DC-DC converters The Cybenetics organization measures efficiency and noise levels across the PSU’s entire operational range, using more than 1,450 different load combinations. OVP (Over Voltage) | UVP (Under Voltage) | SCP (Short Circuit) | OTP (Over Temp) | OPP (Over Power) Efficiency is 80 Plus Gold, and the unit is compatible with the newest ATX 2.4 spec (or 1.31 revision), which brings several updates over the previous version. All ATX 2.4 PSU are normally also Haswell ready, supporting the new sleep states Intel introduced with Haswell.

This unit is equipped with an adequate number of cables. You have two EPS and six PCIe connectors at your disposal, and you can connect numerous drives and peripheral devices to its SATA and peripheral connectors. Cable length is also good; however, we would like the 4-pin Molex connectors to be spaced apart further, at least 13-15 cm. The Corsair Link cable has two headers that connect to the Corsair Link system sold separately; and it allows the PSU to connect with a USB header on the mainboard. All cables are 18AWG, which is the size the ATX spec recommends.