be quiet! Straight Power 12 850W vs Corsair RM1000x: Which Should You Actually Buy?
Head-to-head: be quiet! Straight Power 12 850W vs Corsair RM1000x. Side-by-side specs, real-world performance, price-to-performance and a clear buy...
be quiet! Straight Power 12 850W vs Corsair RM1000x: Which Should You Actually Buy?
A head-to-head comparison of the be quiet! Straight Power 12 850W and the Corsair RM1000x. 850 W 80+ Platinum. Last updated 2026-01-14.
be quiet! Straight Power 12 850W vs Corsair RM1000x: the short version
Two strong options in the same power supply class, aimed at different buyers. Below is a clean side-by-side, the real performance gap, and a no-nonsense recommendation so you stop second-guessing and buy the one that fits your build and budget.
Side-by-side specs
| Spec | be quiet! Straight Power 12 850W | Corsair RM1000x | | --- | --- | --- | | Vendor | be quiet! | Corsair | | Tier | ultra | ultra | | Released | 2023 | 2021 | | Wattage | 850 W | 1000 W | | Efficiency | 80+ Platinum | 80+ Gold | | Form factor | ATX | ATX |
Head-to-head: who wins what
- Performance: be quiet! Straight Power 12 850W and Corsair RM1000x trade blows by workload. be quiet! Straight Power 12 850W has the edge where its stronger 850 W 80+ Platinum matters; Corsair RM1000x wins the rest.
- Efficiency: See the spec table for board power and plan your PSU accordingly.
- Value: Same-class rivals shift price constantly — check current street pricing and let the cheaper one at your target resolution decide value.
- Our pick: Buy be quiet! Straight Power 12 850W if you want the outright ceiling and can cool/power it. Buy Corsair RM1000x if you want lower power, lower cost, or a feature the other lacks. (Plan for ~0 W board power plus the rest of the system.)
Confirm headroom before you commit
A limit you cannot see will eat your gains. Run the Power Supply Calculator to confirm the pair fits your build before you buy either.