Corsair RM850 Power Supply

Corsair RM850

Brand
Corsair
Model
RM850
UPC
840006631163
$113–$125estimated range · from catalog price Sep 3, 2026

Corsair RM850 (2021) is a fully modular 850W 80+ Gold ATX PSU for quiet high-end builds, with triple EPS and no native 12VHPWR (pre‑ATX 3.0).

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
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Wattage850 W
Efficiency80 + Gold
Form factorATX
ModularYes
GixCore Editorial

Product overview

Corsair’s RM850 belongs to the RM Series (2021 refresh) introduced in 2021. It’s an 850 W, 80 PLUS Gold, fully modular ATX unit with a 140 mm rifle‑bearing fan and a Zero RPM mode. The design follows ATX12V v2.4 and ships with PCIe 6+2‑pin leads only—no native 12VHPWR or ATX 3.0/3.1 compliance.

On our scale it’s high_end: a Gold, fully modular PSU built to power today’s single high‑end GPUs and multi‑connector motherboards quietly and efficiently. It’s a good fit for mid-range gaming and many high-end GPU builds with headroom/overclocking in standard ATX cases. Notable: it includes three EPS12V (CPU 8‑pin) cables for boards that need them.

Best for
  • mid-range gaming
  • high-end GPU builds
  • headroom/overclocking
Official product specifications

Specifications

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 73% of power supplies
Wattage
850 W
Efficiency
80 + Gold
Modular
Yes
Eco Mode
No
Form factor
ATX
Pairing fit

Compatible Motherboards

Compatible options ranked for this part's performance class.

Budget pairings6 lower-tier compatible options
Pairing fit

Compatible Cases

Compatible options ranked for this part's performance class.

Budget pairings6 lower-tier compatible options