Corsair
Corsair RM850x Shift ATX Power Supply
A solid mid-range power supplie for PC builders, leading with 850 W.
61/100
850 W80 Plus GoldFully modularATX 3.0WhiteType 5 Gen 1
£278best price at Amazon
In stock at 1 retailer
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Why we rate it
- Zero RPM mode
- 12V-2x6 / 12VHPWR
- All-Japanese capacitors
- Below-average wattage
Score profile
Scored against the power supplies classWhere the Corsair RM850x Shift ATX Power Supply wins and loses
Full specification
Grouped · supported features marked in blueSpecifications
Output
Wattage850 W
Efficiency rating80
ATX standardATX 3.0
Form factor and design
Form factorATX
ModularFully modular
Weight1.7 kg
ColourWhite
Cooling and noise
Zero RPM modeYes
Connectors
12V-2x6 / 12VHPWRYes
Cable typeType 5 Gen 1
Features and warranty
All-Japanese capacitorsYes
Watch it in action
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Head to head
Highlighted cell = better in that rowCorsair RM850x Shift ATX Power Supply vs Gigabyte Gigabyte UD850GM PG5 ICE 850W
Corsair RM850x Shift ATX Power SupplyGigabyte UD850GM PG5 ICE 850W
| CorsairCorsair RM850x Shift ATX Power SupplyThis page | GigabyteGigabyte UD850GM PG5 ICE 850W | |
|---|---|---|
| Overall score | 61 /100Better | 60 /100 |
| Wattage | 850 W | 850 W |
| Efficiency rating | 80 | 80 |
| Form factor | ATX | ATX |
| Modular | Fully modular | Fully modular |
| Warranty | — | 10 years |
Who it's for
Is the Corsair RM850x Shift ATX Power Supply right for you?
Buy it if
Buyers on a budget
Anyone who needs a dependable power supplie for the essentials without overspending.
Skip it if
Skip it if
You need flagship-tier performance, in which case a higher-tier power supplie is the better call.
Performance builder
Chasing frames and headroom in a high-end rig.
good
Mainstream builder
Wants strong value in a balanced build.
good
Budget builder
Stretching every pound in an entry rig.
good
Common questions
Before you buy
Is the Corsair RM850x Shift ATX Power Supply worth it?
It depends on what you need. It scores 61/100 against other power supplies, a solid mid-range result where the class average is around 58.
What stands out on the Corsair RM850x Shift ATX Power Supply?
Its zero rpm mode stands out, a genuinely useful feature if your setup calls for it.
How does it compare to the Corsair RM1000e 2025?
The Corsair RM1000e 2025 scores 62/100 versus this one at 61/100, so it is the step up on the spec sheet.
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