# Corsair RM850x (2024) vs be quiet! Pure Power 12 M 850W: specs and price compared

A sourced, side-by-side comparison of the Corsair RM850x (2024) (Corsair) and be quiet! Pure Power 12 M 850W (be quiet!) among power supplies. be quiet! Pure Power 12 M 850W is the cheaper of the two at $134.9.

## Side by side

| Spec | Corsair RM850x (2024) | be quiet! Pure Power 12 M 850W |
| --- | --- | --- |
| US price | $169.99 | $134.9 |
| Brand | Corsair | be quiet! |
| Released | 2024 | 2023-02 |
| Wattage (W) | 850 | 850 |
| Efficiency rating | 80plus_gold | 80plus_gold |
| Modular | full | full |
| Atx version | ATX 3.1 | ATX 3.0 |
| Pcie 5 12vhpwr | Yes | Yes |
| Fan size (mm) | 140 | 120 |
| Warranty years | 10 | 10 |

## Key differences

- Atx version: Corsair RM850x (2024) ATX 3.1 vs be quiet! Pure Power 12 M 850W ATX 3.0
- Fan size (mm): Corsair RM850x (2024) 140 vs be quiet! Pure Power 12 M 850W 120

## Sources

- Corsair RM850x (2024): https://www.corsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-na (corsair.com, verified 2026-06-19)
- be quiet! Pure Power 12 M 850W: https://www.bequiet.com/en/powersupply/4072 (bequiet.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/power-supplies/corsair-rm850x-2024-vs-be-quiet-pure-power-12-m-850w/
Cite: Per The Front Desk Review, Corsair RM850x (2024) ($169.99) vs be quiet! Pure Power 12 M 850W ($134.9) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/power-supplies/corsair-rm850x-2024-vs-be-quiet-pure-power-12-m-850w/
License: CC BY 4.0.