Be Quiet! Dark Power 12 - 850W PSU Review
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tygrus
Some of the maths is wrong.
"if your components would consume 500W directly from the PSU, then with that 70% efficient product, you'd use and draw 650W"
More likely to draw 714W not 650W.
500/714= ~70%
500/650= ~76.9%
So your calculated 70% and other derived average 80plus power figures are wrong.
If a PSU which is 80% efficient it does not draw 20% more power than the load as heat.
125w from wall = 100w for load & 25w of heat = 80% efficiency.
25w/100w = 25%
To work backwards, 100รท0.80 = 125.
80% = 0.80
The actual measurements of PSU you have reviewed (power draw at the wall) are OK. I'm just talking about those you made up for comparison.
Approx input for 350w load (pg8):
80plus = 420 should be 437.5
Bronze = 402,5 should be 411.7
Silver = 392 should be 397.7
Gold = 385 should be 388.8
Platinum = 378 should be 380.4
Titanium = 364 could be 364.5 (OK, close enough)
These days CPU/GPU require much higher sub-second power than what you see with measured averages. More headroom (unused capacity) means better regulation for today's more sensitive components.
Diminishing returns to increase efficiency past 95% at ever increasing cost.
vestibule
It would be great if you could review PSU's of 400/500w for regular gamers like me.
mdm
vestibule
kapu
In my life i had about 12 bequiet! PSUs , i can recomment them . None of them died . Some are very old . ( oldest being 12 yo), stil work like new.
RavenMaster
Bouhgt the Dark Power Pro 12 (1200w version) just a few days ago. It's doing a great job so far. Completely silent too.
waltc3
I'm still waiting to hear my Corsair HX-850 in some capacity. Of course, my Noctua case fans, +/- radiator fans & pump (if I had any of those), and GPU fans (maybe) are all a bit louder, so that's likely why. Seems like if you need that much power in a system it's because you are using peripherals that might tend to make some noise. Just an observation. OTOH, a system requiring only 400-600W maximum, with all-silent/fanless peripherals, seems like a good fit for a BeQuiet PSU.
Loobyluggs
With regards to the 'subjective acoustic testing', was I really the only one who wanted to see a photo of HH with their ear next to the PSU, with a quizzical look on their face?
mdk77777
Another note on the discussion of cost effectiveness of power supply:
In many parts of the US, air-conditioning is the norm rather than exception.
Where I live (TEXAS) it is on 9/10 of the year.
Paying to heat and then to cool effectively more than doubles the costs that you calculate.
Besides the direct costs there are the ancillary benefits of total PC cooling and fan noise.
I'll take the immediate pain(high up front cost) over the long term pain of loud and hot PC any time.
PS, With COVID and work from home...US usage rates are more like 10 hours a day. ๐
Neo Cyrus
mdm
Neo Cyrus
mdm
cucaulay malkin
Neo Cyrus
cucaulay malkin
both big navi and ga102 are ridiculous to me.
6900xt with 620w spikes stock.
250w is absolute max for me.
kakiharaFRS
Reddoguk
Is 850w enough to power a 3090 Gigabyte gaming OC it's a 2x8pin card with a 5900X not overclocked? Or would you go with a 1000w to be safe?
3-450w for the GPU
105W for the CPU
100W for the mobo/chipset
50-100w for the ram/m.2 x2 SSD x1
50w for mouse/keyboard/headset/controller
That's already 800ish watts. about to pull the trigger on a Seasonic 850 Platinum but am having doubts if it's enough.