The RM1000i isn't cheap, clocking in at £144.95 from Overclockers UK . Of course, the old saying that you get what you pay for rings true and there's no doubt that this is a premium quality product. I'm very impressed by the latest Corsair power supply.

Fully modular cables; Incredible seven-year warranty; Exceptional ripple suppression; Semi-passive design; Fan-test button; Corsair Link; Great for overclocking; Ideal for multi GPU systems; Switchable single/multiple 12v rail; Sense wires + extra capacitors for voltage and ripple regulation

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The Corsair power supplies have been at the forefront of PSU design for many years now, being the first manufacturer to allow your system to monitor your PSU's power draw and other statistics using Corsair link is only just being emulated by other manufacturers.

Corsair might have started off as a computer memory manufacturer, but today they sell a number of components for PCs. One of their most active product lineups is their computer power supply units (PSUs) business, with the company offering dozens of products through six different series.

Corsair's been in the power supply business for quite a few years now. Lately, some have charged that they have lost their way in the marketplace, offering units that cost more than the competition and offer less performance.

I am using this with my Sabertooth z87 mother board, with an i7-4770k @ 3.50 GHz, two samsung SSD 500gb, 2x 8gb memory sticks, my dvd-r and a big and beautiful memory card. The unit was easy to install. It's powerful, quiet and makes it easy to upgrade with multiple plugins for each cable.

The lowest-capacity unit Corsair's RMx line outputs up to 550W and is 80 PLUS Gold-certified. It features fully modular cabling, offers great performance and is nearly silent throughout its operating range, too.

Full power at 48°C; Efficient; Ripple suppression; Silent; Japanese caps; Fully modular; Hold-up time; Load regulation on the minor rails; Performance in Advanced Transient Response Tests; Semi-passive operation; Warranty

Price; No fan test button; Distance between 4-pin Molex connectors

When Corsair launched the RMx-series we only received power supplies of 750 watt or higher. However now we gotten our hands on the 550 and 650 watt models. Note that the price difference is not that much, especially considering the step up in price when looking at an RM850x or an RM1000x.

I personally went for it because of the 10-year warranty and the fully modular design. Very sleek and very quiet when the fan is in operation. Apart from the specifics, included is a handy bag to store the cables you are not using and a single USB motherboard header cable for the monitoring...

My recommendation would be to buy the Corsair RMx/i series and advanced because oh my gosh it was at least less variable in noise production compared to Seasonic. To add icing on the cake, my brother bought Seasonic's Flagship Prime 650W PSU and it had the same loud coil whine as my Seasonic 460FL...

Mini ITX case is the Thermaltake F1 Suppressor; and it's sitting on the table in my silent room so I can easily pick up noise I7 6700 ASUS Dual GTX 1070 (do NOT get this) -gamed at 1080p in Overwatch and WoW maxed settings Corsair is much less heavy in weight and noise.

In order of purchase date: -460 FL: The loudest electronic noise out I heard of the bunch and that I've ever heard of; It's a mix of buzzes and clicks like a quiet but cheap hard drive; Was not tolerable to the slightest.

Bought this to replace a PSU that failed. Runs quiet ( or at least quieter than my GPU, which is all I ever hear ). Fully modular cabling made it easier to retrofit by letting me replace the cables before swapping out the actual PSU unit.