# Corsair RM850x (2024) vs Seasonic Focus GX-850 (V4): specs and price compared

A sourced, side-by-side comparison of the Corsair RM850x (2024) (Corsair) and Seasonic Focus GX-850 (V4) (Seasonic) among power supplies. Seasonic Focus GX-850 (V4) is the cheaper of the two at $149.99.

## Side by side

| Spec | Corsair RM850x (2024) | Seasonic Focus GX-850 (V4) |
| --- | --- | --- |
| US price | $169.99 | $149.99 |
| Brand | Corsair | Seasonic |
| Released | 2024 | 2024-11 |
| Wattage (W) | 850 | 850 |
| Efficiency rating | 80plus_gold | 80plus_gold |
| Modular | full | full |
| Atx version | ATX 3.1 | ATX 3.1 |
| Pcie 5 12vhpwr | Yes | Yes |
| Fan size (mm) | 140 | 135 |
| Warranty years | 10 | 10 |

## Key differences

- Fan size (mm): Corsair RM850x (2024) 140 vs Seasonic Focus GX-850 (V4) 135

## 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)
- Seasonic Focus GX-850 (V4): https://www.amazon.com/Seasonic-GX-850-ATX3-Full-Modular-Compatible/dp/B0DLFMTX12 (amazon.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/power-supplies/corsair-rm850x-2024-vs-seasonic-focus-gx-850-v4/
Cite: Per The Front Desk Review, Corsair RM850x (2024) ($169.99) vs Seasonic Focus GX-850 (V4) ($149.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/power-supplies/corsair-rm850x-2024-vs-seasonic-focus-gx-850-v4/
License: CC BY 4.0.