Researched, not hands-on tested.How we review ›
all judged against power supplies at a similar priceThe be quiet! Pure Power 12 M 850W scores 7.7/10 overall, ahead of the Corsair RMe Series RM750e at 7.2/10.
The be quiet! Pure Power 12 M 850W leads on efficiency and warranty.
The Corsair RMe Series RM750e leads on noise.
They score the same on quality and protections and cabling and connectors.
The biggest difference is warranty, where the be quiet! Pure Power 12 M 850W scores 10/10 to the Corsair RMe Series RM750e's 7/10.
This is an 850 W fully modular ATX 3.0 power supply for builders who want a quiet PC with a modern GPU connector. It suits gaming and general-purpose desktops that will rarely sit near full load. It is a weaker fit for anyone who wants a fan that stops entirely at idle.
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The RM750e is for people building a single-GPU desktop who want a fully modular ATX 3.1 power supply with a native 12V-2x6 cable. It suits builders who value a quiet fan that stays off at idle and a 7-year warranty. It is a weaker fit for machines that idle around the clock, where owners report poor low-load efficiency.
Typically about £89.99 in the UK when we researched itSearch Amazon UK (opens in a new tab, affiliate link)Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
| Criterion | Weight | be quiet! Pure Power 12 M 850W | Corsair RMe Series RM750e |
|---|---|---|---|
| Quality and protections | 30% | 7/10 | 7/10 |
| Efficiency | 20% | 7/10 | 6/10 |
| Cabling and connectors | 20% | 8/10 | 8/10 |
| Noise | 15% | 7/10 | 8/10 |
| Warranty | 15% | 10/10 | 7/10 |
| Overall | 7.7/10 | 7.2/10 |
| Spec | be quiet! Pure Power 12 M 850W | Corsair RMe Series RM750e |
|---|---|---|
| Rated output (W) | 850 W continuous, 900 W peak; 850 W combined 12V output, 600 W combined 12VHPWR | 750 W continuous; +12V rail rated 62.5 A |
| Efficiency rating (80 Plus or Cybenetics) | 80 PLUS Gold; up to 93.2% (manufacturer); Cybenetics [115V] Platinum rating, 89–91% | Cybenetics Gold; up to 89% overall efficiency (manufacturer claim) |
| Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support | ATX 3.0; PCIe 5.1 compatible | ATX; ATX 3.1 certified; PCIe 5.1 compatible |
| Modular cabling (fully, semi or non-modular) | Fully modular | Fully modular |
| Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count) | One 12VHPWR (600 W); four PCIe 6+2-pin; one P8 and one P4+4 CPU; six SATA; two PATA | One native 12V-2x6 (12+4) cable, 650 mm; one 12V-2x6 to dual PCIe 8-pin adapter-style cable; one PCIe 8-pin (6+2) cable (three PCIe 8-pin outputs in total); two EPS 8-pin; six SATA |
| Fan size and zero-fan mode | One 120 mm rifle bearing fan, max 2000 rpm; no zero-fan mode | 120 mm rifle-bearing fan; Zero RPM mode |
| Warranty (years) | 10 years | 7 years |
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