MSI High end
Check on Amazon MPG X870E Carbon WiFi
$370–$409
X870E platform match
Corsair RM850x (2021)
- Brand
- Corsair
- Model
- RM850x
Corsair RM850x (2021) is a fully modular 850W 80+ Gold ATX PSU for high-end builds, with 10-year warranty and optional 12VHPWR cable but no native ATX 3.x.
TierHigh end?GixCore tierWhat a part was built to do — not what it costs.EntryBudgetMainstreamHigh endEnthusiastFlagship A part can be cheap because it is an ageing flagship, or because it is a current entry-level model. The tier tells you which.
Released2021
As an Amazon Associate, GixCore earns from qualifying purchases.Pricing note?This range is based on our last recorded catalog price and is not a quote. Check Amazon for the current price.
Wattage850 W
Efficiency80 + Gold
Form factorATX
ModularYes
GixCore Editorial
Product overview
Corsair’s RM850x is the 850 W model from the RMx (2021) refresh of the long‑running RMx family (SKU CP-9020200-NA), introduced in 2021. It’s a high_end‑tier PSU: 80+ Gold efficiency, fully modular cabling, and an ATX form factor for mainstream to high‑end desktop builds—meant to deliver dependable power without paying for newer ATX 3.x extras. At 850 W it fits single‑GPU high‑end rigs with some headroom, while fully modular Type‑4 cables aid clean assembly and upgrades; Corsair backs it with a 10‑year warranty. This 2021 revision is ATX12V v2.4 and ships without a native 12VHPWR lead, though Corsair offers a compatible 12VHPWR cable for RMx 2021 units. A notable touch is its 135 mm magnetic‑levitation fan.
Best for
Official product specifications - mid-range gaming
- high-end GPU builds
- headroom/overclocking
Pairing fit
Compatible Motherboards
Compatible options ranked for this part's performance class.
Asus High end
Check on Amazon ROG Strix X870-A Gaming WiFi
$256–$283
X870 platform match
Gigabyte High end
Check on Amazon X870 AORUS Elite WIFI7
$228–$252
X870 platform match
Gigabyte High end
Check on Amazon Z890 AORUS Elite WIFI7
$243–$269
Z890 platform match
MSI High end
Check on Amazon MAG Z790 Tomahawk WiFi
$123–$136
Z790 platform match
ASUS High end
Check on Amazon Prime Z790-A WiFi 6E
$123–$136
Z790 platform matchBudget pairings6 lower-tier compatible options
Gigabyte Mainstream
Check on Amazon B850 AORUS Elite WIFI7
$195–$216
B850 platform match
Gigabyte Mainstream
Check on Amazon B850 Eagle WIFI6E
$155–$171
B850 platform match
Gigabyte Mainstream
Check on Amazon B760 AORUS Elite AX
$114–$126
B760 platform match
MSI Mainstream
Check on Amazon MAG B760 Tomahawk WiFi
$129–$143
B760 platform match
MSI Mainstream
Check on Amazon PRO B760-P WiFi DDR4
$133–$147
B760 platform match
ASUS Mainstream
Check on Amazon TUF GAMING B760-PLUS WIFI
$123–$136
B760 platform matchPairing fit
Compatible Cases
Compatible options ranked for this part's performance class.
NZXT High end
Check on Amazon H9 Flow Black
$114–$126
ATX motherboard fit
be quiet! High end
Check on Amazon Silent Base 802 Window Black
$190–$210
ATX motherboard fit
Corsair Enthusiast
Check on Amazon 7000D Airflow full-tower for big builds
$256–$283
ATX motherboard fit
Cooler Master Flagship
Check on Amazon Cosmos C700M Black
$534–$590
ATX motherboard fit
Cooler Master Flagship
Check on Amazon HAF 700 EVO Black
$579–$640
ATX motherboard fit
Cooler Master Enthusiast
Check on Amazon MasterFrame 600 Black
$255–$281
E-ATX, ATX, Micro-ATX, Mini-ITX motherboard fitBudget pairings6 lower-tier compatible options
Lian Li Mainstream
Check on Amazon A3X-WDG Black
$85–$94
mATX motherboard fit
CORSAIR Mainstream
Check on Amazon Crystal 280X RGB
$171–$189
mATX motherboard fit
NZXT Mainstream
Check on Amazon H7 Flow RGB Black
$142–$157
ATX motherboard fit
Corsair Mainstream
Check on Amazon iCUE 220T White
$100–$110
ATX motherboard fit
Corsair Mainstream
Check on Amazon iCUE 220T RGB Airflow Black
$114–$126
ATX motherboard fit
Lian Li Mainstream
Check on Amazon LANCOOL 216 RGB Black
$95–$105
ATX, mATX, Mini-ITX motherboard fitSpecifications
At a glance iEach dot represents a catalog model. Farther right means a higher measured value, not necessarily a better fit.Measured against the power supplies catalog
Current modelCatalog models
Wattage850 W
Higher than 68% of power supplies
- Wattage
- 850 W
- Efficiency
- 80 + Gold
- Modular
- Yes
- Eco Mode
- No
- Form factor
- ATX