Corsair 850 rmx

Corsair 850 rmx DEFAULT

CORSAIR RM850x Modular ATX PSU - 850 W

You won’t get it cheaper. Full Stop.

You won’t get it cheaper. Full Stop.

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Delivering your online order

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Important update on our delivery service for small items

Our courier partners (DPD, Royal Mail and On the Dot) have all updated their delivery processes to take extra precautions due to Coronavirus (COVID-19). Please follow the below advice:

1. Customers can use the DPD app to nominate a ‘safe place’ for their delivery to be left if they do not want close contact.

For customers unable to use the DPD app, DPD is still able to offer a contact-free delivery and will take a picture of the property and capture a proof of delivery name instead of capturing a customer signature.

2. Royal Mail is an unsigned service. Where Royal Mail needs to deliver a parcel, its teams will place the parcel at the customer’s door. Having knocked on the door, the delivery teams will step aside to a safe distance while the item is retrieved. If the delivery cannot take place, Royal Mail will take the parcel to the local depot for collection by the customer.  The parcel will be held for 18 days as per normal process.

3. For On the Dot, where a standard signature delivery is not possible, On the Dot will attempt to leave the parcel in a safe place and inform the customer of where the parcel has been placed.

To see the courier partner for your delivery, please check your dispatch confirmation email (which will also include your tracking reference).

Availability Checker

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Find something you want but it’s not in stock? On the item’s product page, simply click on ‘Email me when back in stock’, and let us have your email address. We’ll let you know as soon as it’s available again.

Returns and refunds

Whether an item you’ve bought is faulty or damaged, or you’ve changed your mind, it’s easy to get a refund.

Items you haven’t opened
Within 21 days of receiving an item you paid for online, on the phone, or in store you can return it for a full refund – provided your purchase is still in its original and unopened packaging. This promise is in addition to your statutory rights.

Items you’ve opened
Within 14 days of receiving an item you paid for online or on the phone, you can return it, even if you’ve opened it. To receive a refund, you must:

  • Let us know you plan to return the item within 14 days of delivery/collection
  • Physically return it within a further 14 days.
The item must be returned in ‘as new condition’ – not used or installed, and in its original packaging. More on returns and refunds.

Order online and collect in store

Order & Collect ­­– The majority of our stores are now open and offering a collection service, allowing you to safely order online and collect from store contact-free.

Our stores with parking available can offer a Drive Thru collection experience using the parking bays clearly marked outside the store. Here’s how it works;

  • Once you’ve had confirmation your order is ready to collect, drive to the store.
  • When you’ve arrived, click on the link in your confirmation email to let our team know.
  • One of our colleagues will put your order in your car boot.

Stores, including those which DO NOT have parking outside, can still offer a safe Walk Up service. We have safety measures in place to keep you and our staff protected whilst you queue. Here’s how it works;

  • Once you’ve had confirmation your order is ready to collect, walk to store and head to the collection point.
  • When you’ve arrived, click on the link in your confirmation email to let our team know.
  • You’ll get a text when our colleague is preparing your order for collection.
  • Please remember to keep 2 metres away from our colleagues and other customers.

If the store already has stock of your item, you may be able to collect on the same day. If your store doesn’t have stock, we can get some in, but it may take a little longer. Don’t forget to wait for your ready to collect email and check store opening hours and whether the store can offer Drive Thru, Walk Up or both collection options before heading out.

We strongly recommend that you check whether you will be able to carry the item, or whether it will fit in your vehicle before placing your order.

Creation - your plan Flexible credit you control

To spread the cost, pay with Your Plan, available at first on orders £99 and over. Exclusions apply. With this uniquely flexible credit option you can:

  • Spread the cost with monthly payments (24.9% APR representative)
  • Choose the payment term that suits you from 12 to 36 months
  • Shop today with no deposit to pay, and even pay everything off early at no extra cost
Plus once you’ve opened a Your Plan account, you can use it to shop on credit in the future on purchases £99 and over. Exclusions apply.

Learn more

How to apply

If you’re buying this item online, you can apply for credit at checkout, select delivery at checkout as credit is currently unavailable on order & collect purchases. Or if you’re planning on shopping in-store, apply here.

Currys Group Limited acts as a credit broker and not a lender. Credit is provided by Creation Consumer Finance Ltd.
Both Currys Group Limited and Creation Consumer Finance Ltd are authorised and regulated by the Financial Conduct Authority.
Sours: https://www.currys.co.uk/gbuk/computing-accessories/components-upgrades/power-supplies/corsair-rm850x-modular-atx-psu-850-w-10191070-pdt.html

Our Verdict

Corsair managed to improve the already great RM850x, offering even higher performance and a magnetic levitation fan.

For

  • Full power at 47 degrees Celsius
  • High overall performance
  • Quiet operation
  • Fully compliant with ATX v2.52
  • Highly efficient at light loads
  • Long hold-up time
  • Low inrush currents
  • Magnetic Levitation fan
  • Loads of cables and connectors
  • Fully modular
  • 10-year warranty

Against

  • High OCP triggering points on the minor rails
  • Transient response at 3.3V could be better
  • In-cable capacitors
  • Small distance between peripheral connectors

It is tough to upgrade something that's already quite good. But Corsair managed to do so with the RM850x power supply, improving the efficiency at light loads, adding one more EPS connector, and using a top-notch magnetic levitation fan. This is a product worthy of our list of the best power supplies. Its competitors include the XPG Core Reactor 850W and the similar capacity Cooler Master V850 Gold V2 model. The more affordable Corsair RM850, which is close in performance to the RM850x, is another fine option in this category.  

Corsair's RMx line is among the most popular in today's mid-segment PSU market, so updating was a daunting task.

The use of a magnetic levitation fan is a great asset. The rifle bearing used in the previous generation RMx line was good, but there is no comparison with the ML fan that the new units utilize; Rifle and fluid dynamic bearings cannot cope with high operating temperatures. The only problem is the more aggressive fan profile, but updates from Corsair mean the new RM850x batches have lower average noise output than the initial production units. 

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Product Photos

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The RM850x (2021) is the strongest member of the line, with enough power to handle a strong gaming system or a video editing workstation. To support the ultra-high-end mainboard, Corsair equipped it with three EPS connectors, something that's hard to find in today's market, even in stronger PSUs. The fully modular cable design is a must in this price range, and the same goes for the ten-year warranty, from the moment all competing offerings are supported by equally long warranty periods. Lastly, the PSU's dimensions are normal with 160mm length, so there won't be any compatibility issues with ATX cases. 

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Product Photos

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Specifications

Manufacturer (OEM)

CWT

Max. DC Output

850W

Efficiency

80 PLUS Gold, Cybenetics Gold (87-89%)

Noise

Cybenetics A- (25-30 dB[A])

Modular

✓ (Fully)

Intel C6/C7 Power State Support

Operating Temperature (Continuous Full Load)

0 - 50°C

Over Voltage Protection

Under Voltage Protection

Over Power Protection

Over Current (+12V) Protection

Over Temperature Protection

Short Circuit Protection

Surge Protection

Inrush Current Protection

Fan Failure Protection

No Load Operation

Cooling

140mm Magnetic Levitation Fan (NR140ML)

Semi-Passive Operation

Dimensions (W x H x D)

150 x 85 x 160mm

Weight

1.71 kg (3.77 lb)

Form Factor

ATX12V v2.53, EPS 2.92

Warranty

10 Years

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202070.830.3
Watts150849.6153.6
Total Max. Power (W)850

Cables & Connectors

DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (610mm)1116-20AWGYes
4+4 pin EPS12V (650mm)3318AWGYes
6+2 pin PCIe (600mm+150mm) 2416-18AWGYes
SATA (500mm+110mm+110mm+110mm)2818AWGNo
SATA (520mm+110mm+110mm)2618AWGNo
4-pin Molex (450mm+100mm+100mm+100mm)1418AWGNo
AC Power Cord (1400mm) - C13 coupler1118AWG-

The cables are long enough, and it is impressive to see three EPS and four PCIe available. There is no need for more PCIe, given that the majority of users have a single graphics card installed. The only letdown is the small distance between the peripheral connectors. 

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Cable Photos

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Component Analysis

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

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Manufacturer (OEM)CWT
PCB TypeDouble Sided
-
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush ProtectionNTC Thermistor SCK-037 (3 Ohm) & Relay
Bridge Rectifier(s)

2x GBU1506 (600V, 15A @ 100°C)

APFC MOSFETs

2x Vishay SiHF30N60E (650V, 18A @ 100°C, Rds(on): 0.125Ohm)

APFC Boost Diode

1x On Semiconductor FFSP0865A (650V, 8A @ 155°C)

Bulk Cap(s)

2x Nippon Chemi-Con (400V, 470uF each or 940uF combined, 2,000h @ 105°C, KMW)

Main Switchers

2x On Semiconductor FCPF190N60E (600V, 13.1A @ 100°C, Rds(on): 0.19Ohm)

APFC Controller

Champion CM6500UNX & Champion CM03X

Resonant ControllerChampion CU6901VAC
Topology

Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters

-
+12V MOSFETs6x On Semiconductor NTMFS5C430N (40V, 131A @ 100°C, Rds(on): 1.7mOhm)
5V & 3.3V

DC-DC Converters: 2x UBIQ QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm) & 2x UBIQ QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm)
PWM Controllers: UPI Semi uP3861P

Filtering Capacitors

Electrolytic: 7x Nippon Chemi-Con (1-5,000h @ 105°C, KZE), 7x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 1x Rubycon (4-10,000h @ @ 105°C, YXJ)
Polymer: 37x FPCAP

Change Over Switch1x Sync Power SPN3006 MOSFET (30V, 57A @ 100°C, Rds(on): 5.5mOhm)
Supervisor ICWeltrend WT7502R (OVP, UVP, SCP, PG)
Fan ControllerMicrochip PIC16F1503
Fan ModelCorsair NR140ML (140mm, 12V, 0.27A, Magnetic Levitation Bearing Fan)
-
Rectifiers1x PS1045L SBR (45V, 10A) & IPS ISD04N65A (650V, 2.5A @ 100°C, Rds(on): 2.2 Ohm)
Standby PWM ControllerOn-Bright OB5282
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Overall Photos

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Channel Well Technology (CWT) remains the OEM of the RMx line, and it did a great job under Corsair's strict supervision. The platform has some differences from the older one to provide increased efficiency at light loads and support for alternative sleep modes. The most important change is the new fan, with ML bearings. These fans do not come cheap, so it is a nice surprise that Corsair decided to use them in the new RMx line. 

The build quality is good overall. Corsair used Japanese capacitors on both primary and secondary sides, and known manufacturers provide the FETs. 

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Transient filter

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The transient/EMI filter has all necessary parts and it does a good job, in restricting EMI emissions. 

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Bridge rectifiers

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The two powerful bridge rectifiers are more than enough to handle the max power that this platform can deliver. 

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APFC converter

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The APFC converter uses two Vishay FETs and a single boost diode, by On Semiconductor. These are high-quality parts. 

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Main FETs and primary transformer

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The main switching FETs, provided by Infineon, are installed into a half-bridge topology. An LLC resonant converter is also used to boost efficiency. 

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12V FETs and VRMs

Sours: https://www.tomshardware.com/reviews/corsair-rm850x-2021-power-supply-review
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corsair Logo Corsair Corsair RM850x 850 Watt 80 Plus Gold ATX Fully Modular Power Supply 2018

Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified efficiency, and a fully modular cable set. Built with all Japanese 105C capacitors, theyre 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. And, the fully modular DC cables make builds and upgrades easy, with clean, great-looking results.

Sours: https://www.microcenter.com/product/503339/corsair-rm850x-850-watt-80-plus-gold-atx-fully-modular-power-supply-2018

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Corsair WHITE RM850x RMX PSU

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