MSI High end
Check on Amazon MPG X870E Carbon WiFi
$370–$409
X870E platform match
Corsair RMX White Series (2018), RM850x
- Brand
- Corsair
- Model
- RMX White Series (2018), RM850x
- UPC
- 843591075701
Corsair RM850x White (2018): 850W 80+ Gold fully modular ATX PSU for quiet mid‑range to high‑end builds; pre‑ATX 3.0 with no native 12VHPWR.
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.
ReleasedAug 2018
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
Released on August 16, 2018, the Corsair RMx White Series (2018) RM850x is a white-finished member of Corsair’s RMx (2018) refresh. It’s an 80 PLUS Gold, fully modular ATX unit with a 10‑year warranty and ATX12V v2.4/EPS 2.92 compliance.
Positioned as high_end for its class, it exists to provide a quiet, reliable 850 W option for clean-looking builds. It suits mid‑range gaming through many high‑end GPU builds that use 8‑pin PCIe power, offers headroom for powerful CPUs via dual EPS, and features a zero‑RPM fan mode for low‑noise operation. Being pre‑ATX 3.0, it lacks a native 12VHPWR lead and is best paired with GPUs that don’t require it or with adapters. Notable: compact 160 mm depth helps in tighter ATX cases.
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
$119–$131
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
Corsair Mainstream
Check on Amazon 3000D Airflow White
$94–$104
ATX motherboard fit
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 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