Corsair RMi Series 850W Fully Modular Power Supply

850W Corsair RM850i, Full Modular, 80 PLUS Gold, SLI/CrossFire, Single/Multi Rail, 70.8A, 135mm Fan, ATX PSU

Scan code: LN65076 Manufacturer code: CP-9020083-UK Request call
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review 3xs Approved High End
Delivery options £5.48 By DPD On 26th Jun 2017 DPD Delivered to your specified address. Receive SMS with one-hour delivery window. £4.79 Collect from local shops UPS and DPD Pickup Collect your parcel from your newsagents, petrol stations and convenience stores. Free Collect Instore Q-Collect Place your order online and collect from our Bolton store with Q-Collect. Weekend, timed and European delivery options are available at checkout ScanProtect protection ScanProtect Protect against installation damage for 28 days.More
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Product Overview Corsair RMi series power supplies give you extremely tight voltage control, quiet operation, Gold-certified efficiency, and a fully modular cable set. Built with all Japanese 105°C capacitors, they’re a great choice for high performance PCs where reliability is essential. 80 PLUS Gold efficiency reduces operating cost and excess heat, and Zero RPM fan mode ensures virtual silence at low and medium loads. Corsair Link Digital makes it easy monitor power supply performance, toggle single rail or multi rail mode, and control fan speed directly from your desktop. And, the fully modular DC cables make builds and upgrades easy, with clean, great-looking results. Features • 80 PLUS Gold certified: High efficiency operation for less excess heat and lower operating costs
• 100% All Japanese 105°CC capacitors: Premium internal components ensure solid power delivery and long term reliability
• Zero RPM Fan Mode: Virtually silent operation at low and medium loads
• Configurable +12V rail options: it's your choice -- run it in the default multi-rail +12V mode, or toggle single-rail operation
• Fully Modular: Make your builds and upgrades easy, with clean, great-looking results.
• Corsair Link Digital: Our advanced desktop application lets you monitor and log fan speed, voltages and power consumption, as well as control fan speed and toggle the +12V rail from multi-rail to a single +12V rail.
• Seven year warranty: Your guarantee of reliable operation that will last across several system builds
Size ATX
Edition RM850i
Wattage 850 W
80 PLUS Certification 80 PLUS Gold
Max. Efficiency 92 %
Cooling Fan
Fans 1 x 135mm
Internal +12V Rails Single/Multi Rail
Rail 1 +12V 70.8 A
Rail 2 +12V N/A
Rail 3 +12V N/A
Rail 4 +12V N/A
Rail 5 +12V N/A
Rail 6 +12V N/A
Max. Combined Output +12V 70.8 A
Modular Yes
Modularity Full Modular
SLI/CrossFire Yes
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 2 x 4+4-pin CPU +12V (EPS)
  • 1 x 4-pin ATX 12V
  • 8 x 4-pin Molex
  • 6 x 6+2-pin PCIe
  • 2 x FDD Power
  • 10 x SATA
Dimensions 150 x 86 x 180 mm (WxHxD)
Package Type Retail

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120 months
Return to base
RTB Period:
120 months
Manufacturer Contact Details
0871 472 4747
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850W Corsair RM850i, Full Modular, 80 PLUS Gold, SLI/CrossFire, Single/Multi Rail, 70.8A, 135mm Fan, ATX PSU is rated 5.0 out of 5 by 5.
Rated 5 out of 5 by from Great quality, no problems so far I have three HDDs, an SSD, an i7 processor, a GTX 970 GPU and an X-99 PRO motherboard. This PSU has supplied all of them under stress with zero problems so far. The modular cables were a lifesaver for my horrible cable managing skills, with a lot of cables and slots left over for future expansion without taking up unnecessary space in the case. I'd definitely recommend a modular PSU to pretty much everyone who is concerned with cable management or has very little space, the extra price is well worth the time and ease of use.
Date published: 2016-07-19
Rated 5 out of 5 by from Very happy Bought this to replace an old 650w Corsair ready for upgrading everything else in my rig. Not had a modular PSU before, but it allows for nice neat cabling with enough supplied for my needs. The voltages are all stable and the Corsair link software can make a handy system monitor. Very quiet as the fan has never kicked in so far, there is a test button so you can check it actually does work. Long warranty and the build quality is good. The price was right and the delivery fast and efficient.
Date published: 2016-04-08
Rated 5 out of 5 by from Very quiet! I replaced a 500W PSU with this, it was a bit bigger than the old one so took a bit of fiddling to get it in but I expected this. The main thing I noticed was how quiet it is! the old one resonated with a nearby radiator when running but not this one, thankfully. The main problem was that my MB has a 4 pin CPU power socket. I couldn't find a 4 pin lead in the supplied leads, so called Scan who were most helpful and quickly sent a replacement one. With an 8 pin plug (2X4). I sat down and had a cuppa. then fiddled about and found that either the left or right half of the 2X4 plug fitted the socket. I Googled it and saw that the 8 pin plug can be fitted this way, one side plugged in and the other redundant. If I'd only been told this in the first place.....
Date published: 2016-04-01
Rated 5 out of 5 by from Great Power Supply!! Extremely quiet even under load Zero RPM fan mode works perfectly and stays off even under lite gaming loads Monitoring software works great, letting you know how many watts is being drawn at any time and allowing for custom fan curves. More than enough cables in nicely package bag allowing for SLI/Crossfire configurations out of the box Overall great product and worth the investment!
Date published: 2016-03-30
Rated 5 out of 5 by from all the power you need. great little PSU, The packaging is superb, with a draw string bag for the psu itself, and a bag with all the cables in. The cables are mostly braided, with the exception of sata power and the usb for corslink. Runs quiet and cool, easy install, very happy with the product
Date published: 2016-02-29
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Questions & Answers

Is this good enough for a gaming PC

My old PSU has died it was a Corsair AX 850 would this be good enough for gaming? or would be better?
Asked by: Loateal
Hello, This would be suitable for most gaming rigs. Thanks,
Answered by: LizN
Date published: 2016-05-28
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Corsair RMi Series 850W Fully Modular Power Supply
Corsair RMi Series 850W Fully Modular Power Supply