# Corsair RM850x (2024) vs MSI MPG A1000G PCIE5: specs and price compared

A sourced, side-by-side comparison of the Corsair RM850x (2024) (Corsair) and MSI MPG A1000G PCIE5 (MSI) among power supplies. Corsair RM850x (2024) is the cheaper of the two at $169.99.

## Side by side

| Spec | Corsair RM850x (2024) | MSI MPG A1000G PCIE5 |
| --- | --- | --- |
| US price | $169.99 | $199.99 |
| Brand | Corsair | MSI |
| Released | 2024 | 2022-09 |
| Wattage (W) | 850 | 1000 |
| 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

- Wattage (W): Corsair RM850x (2024) 850 vs MSI MPG A1000G PCIE5 1000
- Fan size (mm): Corsair RM850x (2024) 140 vs MSI MPG A1000G PCIE5 135

## What reviewers say

**MSI MPG A1000G PCIE5** — Only one whitelisted tester (Tom's Hardware) lab-tested this exact model. It praised the unit's exceptional power quality, tight 12V regulation and low operating temperatures, while flagging an aggressive fan that turns loud above 500W, slack OCP/OPP thresholds, a high-load efficiency drop, and a steep price. (1 sourced review.)

## 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)
- MSI MPG A1000G PCIE5: https://www.newegg.com/msi-atx-atx-3-0-compatible-atx12v-1000-w-80-plus-gold-certified-power-supplies-black-mpg-a1000g-pcie5/p/N82E16817701016 (newegg.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/power-supplies/corsair-rm850x-2024-vs-msi-mpg-a1000g-pcie5/
Cite: Per The Front Desk Review, Corsair RM850x (2024) ($169.99) vs MSI MPG A1000G PCIE5 ($199.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/power-supplies/corsair-rm850x-2024-vs-msi-mpg-a1000g-pcie5/
License: CC BY 4.0.