Corsair’s RM Series justifiably won a lot of praise when it entered the market, bringing 80 Plus Gold-rated PSUs to a new price point, and performing well in all departments. One aspect of the range kept haunting the company, though, at least with demanding users: its use of Taiwanese rather than Japanese capacitors, as the latter are perceived as being superior.
Even though no test results or long-term use scenarios have demonstrated any basis for this criticism, this decision seemed to damage the reputation of the RM Series with the high-end crowd. Corsair, ever willing to listen to its users, introduced the RMi Series this year, though, replacing all the capacitors with Japanese-made ones, while introducing digital status monitoring.
Of course, the merits of the former change aren’t testable, if they even exist, but the RM750i remains a sterling PSU, with a fully modular design and a single 12V rail that’s capable of delivering 62.5A. There are plenty of connectors on the attractive, long flat cables, making installation a breeze. The average efficiency is also very good at 89.47 per cent. Efficiency at very low loads efficiency isn’t quite as good, but from 50W and upwards, it’s perfectly fine. Ripple values are outstanding too, maxing out at 8.2mVtt.
Meanwhile, the 135mm fan only spins up after prolonged use under load and even then, it’s inaudible, with our meter hitting just 23.5dB(A). Bear in mind, though, that this large PSU has a length of 180mm, so make sure you case can accommodate it. The RM750i is a little pricier than its direct competitors, but the exemplary test scores justify the extra cash, even if the changed components perhaps bump up the price unnecessarily. Either way, the RM750i remains an exceptionally quiet PSU that’s efficient, well designed and good value for money.
Exceptionally quiet, efficient, well designed and good value for money. An excellent PSU if you have the cash.