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 Lian Li SP750 at 5.9/10.
The be quiet! Pure Power 12 M 850W leads on quality and protections, cabling and connectors, noise and warranty.
They score the same on efficiency.
The biggest difference is warranty, where the be quiet! Pure Power 12 M 850W scores 10/10 to the Lian Li SP750's 5/10.
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 Lian Li SP750 is a 750 W SFX power supply for compact builds that need a fully modular unit with an 80 PLUS Gold rating. It suits builders who want quiet running and flexible braided cables in a small case. It is a weaker fit for anyone who needs a native 12V-2x6 cable or many SATA connectors.
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| Criterion | Weight | be quiet! Pure Power 12 M 850W | Lian Li SP750 |
|---|---|---|---|
| Quality and protections | 30% | 7/10 | 6/10 |
| Efficiency | 20% | 7/10 | 7/10 |
| Cabling and connectors | 20% | 8/10 | 5/10 |
| Noise | 15% | 7/10 | 6/10 |
| Warranty | 15% | 10/10 | 5/10 |
| Overall | 7.7/10 | 5.9/10 |
| Spec | be quiet! Pure Power 12 M 850W | Lian Li SP750 |
|---|---|---|
| Rated output (W) | 850 W continuous, 900 W peak; 850 W combined 12V output, 600 W combined 12VHPWR | 750 W maximum DC output; +12V 744 W; +3.3V/+5V 100 W combined |
| Efficiency rating (80 Plus or Cybenetics) | 80 PLUS Gold; up to 93.2% (manufacturer); Cybenetics [115V] Platinum rating, 89–91% | 80 PLUS Gold |
| Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support | ATX 3.0; PCIe 5.1 compatible | SFX, 100 x 63.5 x 125 mm (D x W x H) |
| 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 | Three PCIe 8-pin (6+2) outputs; one CPU, two SATA and one peripheral connector listed by manufacturer; no 12V-2x6 or 12VHPWR cable listed |
| Fan size and zero-fan mode | One 120 mm rifle bearing fan, max 2000 rpm; no zero-fan mode | One 92 mm hydraulic-bearing fan; zero-RPM mode until 40% load |
| Warranty (years) | 10 years | 5 years |
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