Best Power Supplies · head-to-head
Corsair RM850x (2024) vs Seasonic Focus GX-850 (V4)
A sourced, side-by-side spec comparison. Seasonic Focus GX-850 (V4) is cheaper at $149.99. Every spec and price links to its source.
Side by side
| Corsair RM850x (2024) | Seasonic Focus GX-850 (V4) | |
|---|---|---|
| US price | $169.99 (MSRP, black model) | $149.99 (MSRP, black model) |
| 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 | true | true |
| fan size mm | 140 | 135 |
| warranty years | 10 | 10 |
| release year | 2024 | 2024 |
Sources — Corsair RM850x (2024): corsair.com (verified 2026-06-19). Seasonic Focus GX-850 (V4): amazon.com (verified 2026-06-19).