Be Quiet! Pure Power 11 FM - 1000W PSU Review

PSU - Power Supply Units 105 Page 7 of 7 Published by


Final Words & Conclusion

Final words & conclusion

The FM model of the Pure power 11 received a significant improvement in that it is now 100 percent modular. Apart from that, this appears to be an overall very decent power supply. Perhaps a little pricey, but we'll discuss that further at the conclusion. This refresh overall includes a minor configuration change and an aesthetic adjustment, with now an 850W and 100W model added to the linup. And, while a GOLD-certified device may not get you that last last ten watts of energy efficiency, we must recognize the product as a fine mainstream to high-end power supply series. We have no reservations about the quality, durability, or efficiency of this power supply series. It indicated where it should be and looks good. The warranty is five years, which is a bit disappointing considering Corsair's competing RMx 2021 series provides a ten-year warranty. Additionally, a significant component these days is appearance, and the PP11 FM series looks fantastic in its black style. A significant advantage is a completely modular design, which features attractive all-black wires and connectors. The series' efficiency is spot on gold certification when compared to other PSUs in this category; coupled with the modular design, this is an undeniably attractive PSU series. Looks, acoustics, and quality matter, and again. As far as the ODM goes, this design was outsourced to what seems to be a CWT origin.


As with any power supply, half the maximum load rating is your point of equilibrium, the sweet spot at which it operates at peak efficiency, which in this case is 92 percent (@230 Volts). As such, the 500 Watt range is a sweet spot. ionly an enthusiast class gaming PC with a dedicated (6900XT / RTC 3080/3090) graphics card would consume around that amount during a lengthy gaming session (I am talking enthusiast-class). You could purchase a more efficient power supply ranging from Bronze to Platinum. It's become a bit of a marketing issue over the years, as differences of a few percent are really all we're talking about here. That is also the difference in percent on your electric bill. We've shown the power discrepancy based on a 50% PSU load against the energy usage below (wall side).

Maximum Watt (PSU) 50% Watt 80plus Bronze Silver Gold Platinum Titanium Volts
1000 500 625 588 562 543 532 521 230v
500 625 588 568 556 543 532 110v
Rate 23 cents per kWh / 230V
Cost 50% Gaming usage 5 hours day / 5 days week/year EUR/USD 52 49 47 46 45 44 230v
Cost 50% Mining usage 24/7 year EUR/USD 914 860 822 795 778 762 230v

Let's say you game 5 hours per day, 5 days a week for a full year. During gaming, you'll consume 500 Watts (= a fair estimation for an enthusiast-class PC). We assume you pay 23 cents for each kWh of energy. As you can see, from 80plus to Titanium, the difference is eight EUR/USD for thirteen hundred hours of gaming per year. My overall advice is to go with silver or gold; platinum/titanium power supplies often carry a big price premium. I do want to state, though, that efficiency also says something about build quality. Follow your instinct, I'd say. Now, this plot and math is e based on gaming. Of course, if you'd have your PC active 24/7 for mining, you'll want as efficient PSU as possible as coming from 80plus to Titanium you'll save roughly 152 USD/EUR per year (depending on kWh prices).



Stability-wise, we have very little, actually, nothing, to complain about as at half load, say 300~350watts, voltages remained to drop dead in sync. But we'll trust that some other reviews will offer you some ripple tests, yet have no doubt the product will come out totally clean. Kick-ass is obviously the option for four rails; the tested 650W model has enough power to handle one fairly high-end graphics card. Realistically for a PC with a single graphics card, a 650 or 750 model is best suited as a recommendation. If you are an overclocker/tweaker .. leave some reserve and go with 750 a model. 


Stability-wise, we have little, if anything, to complain about, as voltages remained in sync at half load, say 450~500watts. However, we'll trust that other reviewers will provide you with some ripple testing, and have no doubt that the product will pass with flying colors. Naturally, kick-ass is the preferred option for four rails; the tested 1000W variant is more than capable of powering a very high-end graphics card. In reality, for a PC with a single discrete graphics card, a 650 or 750 model is the optimum option. If you are an overclocker/tweaker, set aside some funds and purchase a 850/1000 model but only if you have that premium GPU and CPU.


 Final words

Be quiet! moved away from FSP and are now building the PSU series with respected CWT; with a touch of Listan (the firm behind be quiet!) in the design; and that certainly applies to silence, build quality, and gold-rated efficiency. It does not, however, include a hybrid fan/fan stop mode. The majority of power supply manufacturers designated that as a 'luxury' feature reserved for the more expensive SKUs. We do not see a real requirement for a fan to remain active at this level of efficiency, we believe this to be a disadvantage, but only a slight one. The entirely modular design is pleasing to see. This 1000W model will cost ~$155 USD/EUR, which is a reasonable price. The Corsair Rmx series is the direct competitor and is slightly more expensive (but does come with a better 10-years of warranty). For a gamer who spends a few hours a day gaming, you should consider your options; Gold, Platinum, or even Titanium. As the price advantage will however be significantly greater than the long-term energy savings. On the other hand, the less energy you spend, the better, from an environmental standpoint. Finally, we believe that the Pure power 11 FM power supply series is a strong power supply series. You cannot go wrong with it; it features a good dark design, modular construction, high efficiency, and absolute silence. It is a pure gold PSU series, pun intended. However, we are disappointed that this PSU lacks a fan-stop. The be quiet! Pure Power 11 FM 850 W and 1000 W will be available to purchase from February 8th.

  • Pure Power 11 FM 850 W - €124.90 $129.90 £109.99
  • Pure Power 11 FM 1000 W - €154.90 $159.90 £134.99

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