Corsair HX850W (850w) ATX PSU

Introduction & Specs
Corsair LogoA little over a month ago Corsair announced two new PSU’s to join their extremely popular HX line-up. The HX750 and HX850 are two models designed to bridge the rather large gap between the original HX620W unit released in 2006 and the HX1000W released almost two years later. As anyone who’s looked into purchasing a PSU recently will tell you, both of these PSU’s are widely regarded as being the best in their class, with Corsair not only using only the best factories to build the units, but also specifying upgraded components and various other modifications to improve their performance. In fact, in the case of the HX1000W, Corsair not only picked one of the best OEM’s in the industry (Channel Well Technology), but also conservatively labelled the units 1200w output as 1000w just to ensure flawless results.
So today we’ve been given the pleasure of being one of the first sites in the UK to check out the HX850W. Once again both the HX750W and HX850W models are built by CWT, but in a recent conversation with Corsair they confirmed to us that these units are no ‘off the shelf’ models. They are instead a completely custom design and specification, built after several months of co-operation between Corsair and CWT. However, before I get ahead of myself and start blurting out all of the juicy details let’s check out the specs listed on Corsair’s website:
– Guaranteed to sustain its full rated wattage at an ambient temperature of 50°C
– Up to 90% energy-efficiency under real-world load conditions*
– Single +12V rail design providing up to 70A
– Multi-GPU ready
– 105°C solid state capacitors
– Active Power Factor Correction (PFC) with PF value of 0.99
– Supports ATX12V 2.3 and EPS12V 2.91 standards. Backwards compatible with ATX12V 2.01
– Auto switching circuitry for universal AC input from 90-264V
– Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection provide complete component safety
– Dimensions: 150mm(W) x 86mm(H) x 180mm(L)
– MTBF: 100,000 hours – Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÃœV, CCC, C-tick  
(Queue Slobber)….Yes, if the specs are anything to go by then the HX850W is certainly going to shape up to be one drool-worthy unit. We have 105c solid state caps, a single +12v rail rated at 70 amps and up to 90% efficiency. Basically everything neccesary to certify the HX850W as PSU porn. Additionally, while I was bashing away at this page Corsair also received word that the HX850W had met 80PLUS Gold Certification. Stellar stuff.
However, I’m not going to let these mere words seduce me. After all the proof of a PSU is in the testing. So let’s move swiftly on to the next page for a closer look.