Corsair RM750 (CP-9020234)

The Corsair RM750 is a 750 W fully modular ATX power supply from Corsair's RM Series, sold under the part number CP-9020234. Corsair's headline for the series is gold-certified quiet power: fully modular, ultra-low-noise power supplies with multiple EPS12V connectors and 80 PLUS Gold efficiency, with all the connections needed to power demanding upgrades. The series is offered in black or white. The manufacturer page we used shows no price for this unit, and no launch date, so this entry gives neither. What follows summarises the published electrical table, the cable list and the feature claims, adds a few arithmetic checks, and explains plainly which modern features this unit does not have. We have not measured it ourselves.

Ratings and rails

The power table lists the model code RPS0119 and the part number CP-9020234 with the factory suffix 75-004586. The AC input range is 100 to 240 V at 10 to 5 A and 47 to 63 Hz. The +12 V rail is rated for 62.5 A and 750 W. The +3.3 V and +5 V rails are each rated for 20 A, with a combined limit of 150 W. The -12 V rail is rated for 0.3 A and 3.6 W, and the +5Vsb standby output for 3 A and 15 W. Total power is 750 W. As a check, 62.5 A multiplied by 12 V is exactly 750 W, so the whole rating is on the +12 V rail, which is what current CPUs and graphics cards draw from. The 150 W combined limit for the 3.3 V and 5 V rails is higher than the 110 W figure on Corsair's newer RM750e, which matters little for modern builds but shows how the design changed between the two families. To judge whether 750 W is the right size for your system, our guide on how much PSU wattage you need explains how to add up the components.

Standards, efficiency and what is missing

The tech specs list an ATX12V version of 2.4, 80 PLUS Gold efficiency, a mean time between failures of 100,000 hours and support for Microsoft Modern Standby, which Corsair says gives extremely fast wake-from-sleep times and better low-load efficiency. Corsair describes the efficiency as upwards of 90 percent peak and explains that the Cybenetics organisation measures efficiency and noise across more than 1,450 load combinations; the page prints the gold and A- criteria in a truncated form, and its tech-spec table does not list the Cybenetics grades for this unit, so we do not state them. The important caveat is the standard version. ATX12V v2.4 predates the ATX 3.x standards and the 12V-2x6 connector, and the page does not list a native 12V-2x6 cable. It does say the unit is compatible with Corsair's 12-pin GPU power cable, which is sold separately. If you are building around a current high-power graphics card, read our explainer on the 12VHPWR power connector and compare this unit with the newer Corsair RM850x (2024), which lists ATX 3.1 and a native 12V-2x6 cable.

Fan and noise

Corsair specifies a 140 mm rifle-bearing fan with a specially calculated fan curve intended to keep noise to a minimum even at full load. A Zero RPM mode switches the fan off entirely at low and medium loads, and the fan starts when the load picks up so that critical component temperatures stay in check. The page lists no decibel figures and no switch or knob to override the mode, so we do not claim one. For a deeper look at how fan modes and airflow decide whether a PC is quiet, see our silent PC build guide.

Cables and connectors

The cable table lists a 24-pin ATX cable at 610 mm, sleeved; three EPS/ATX12V 8-pin (4+4) cables at 650 mm, flat; two PCIe 8-pin (6+2) cables with two connectors each at 750 mm in total length with the connectors spaced at 600 mm and 150 mm; two SATA cables with three right-angle connectors and two SATA cables with four right-angle connectors; and one PATA cable with four connectors at 750 mm. Reading the table as written, that is four PCIe 8-pin connectors, which is enough for a graphics card that needs two or three 8-pin plugs, and three EPS cables, which suits workstation boards that want two CPU power inputs. The SATA rows would add up to fourteen connectors, but the tech-spec section does not give a SATA total, so please confirm against the package contents if you plan a large array of drives. The cables are Type 4, shared with other modern Corsair units, and the power-supply side takes cables only from the matching family.

Size, weight and warranty

The page lists a weight of 3 kg and does not list dimensions. The warranty is ten years, which is long for a power supply at this capacity and is the same period our database shows for the RM850x (2024). Corsair offers individually sleeved cable sets for the series as accessories, in black and white, if you want a colour-matched build.

Where it sits in our database

Among the Corsair power supplies in our database, the RM750 sits between the entry-level and the current flagship ranges. At the budget end, the Corsair CX600M lists 600 W, 80 PLUS Bronze, semi-modular cabling and a three-year warranty, so the RM750 offers 150 W more, a higher efficiency class, full modularity and seven more years of warranty. Compared with the newer RM750e from the same brand, it has the longer warranty and a fan size of 140 mm that the page names, but it lists an older ATX version and no 12V-2x6 cable; the comparison page puts those differences side by side. The whole power supply category shows every other model.

What the page does not say

The page does not give a price, dimensions, the Cybenetics grades for this unit, hold-up time or individual protection circuits, and it does not state a launch date. Its fan description does not say whether the fan bearing is rated for a particular life. Treat this entry as a faithful summary of the published specification, and check the physical fit and the connectors your graphics card needs before you order.