The RM850 offers solid performance at a reasonable price, but only consider it if the street price is significantly lower than the RM850x. Corsair’s line of RMx power supplies are renowned for their compact dimensions and quiet operation, but not their low prices. With an MSRP of $119.99 (£109.99), the new Corsair RM850 promises similar performance and acoustics to the more-expensive RM850x, but at a more affordable price point. However, to cut costs, Corsair has used lower-quality capacitors and a lesser cooling fan. These compromises result in a PSU that’s not quite as quiet as its big brother, but could be a good choice if the street price is significantly lower. Corsair’s new RM (without the “x”) line consists of three members with capacities ranging from 650W to 850W. All of them are more affordable versions of the corresponding RMx models, which we expect to be updated in the near future to be fully compatible with the latest ATX specification. The RM units mostly use Chinese Elite caps, which are of decent quality, instead of the superior Japanese Nichicon and Chemi Cons and employ Hong Hua rifle bearing fans instead of Corsair’s more-p...