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Description
be quiet! System Power 11 550W is ATX 3.1 compliant and PCIe 5.1 compatible, 5-year manufacturer's warrantySYSTEM POWER 11 550W Proven Reliability, Quiet Operation System Power 11 is the ATX 3. 1 PSU for value oriented PC builders that do not want to pass on reliability and quietness. Highlights ATX 3. 1 PSU with support for PCIe 5. 1 GPUs and GPUs with 6+2 pin connectors Temperature controlled 120mm quality fan reduces system noise Rock solid stability with a strong 12V rail Tight voltage regulation using DC to DC technology Up to one PCIe 5. 1 12V 2x6
SYSTEM POWER 11 550WProven Reliability, Quiet Operation System Power 11 is the ATX 3.1 PSU for value-oriented PC builders that do not want to pass on reliability and quietness.
Highlights
ATX 3.1 PSU with support for PCIe 5.1 GPUs and GPUs with 6+2 pin connectors
Temperature-controlled 120mm quality fan reduces system noise
Rock-solid stability with a strong 12V-rail
Tight voltage regulation using DC-to-DC technology
Up to one PCIe 5.1 12V-2x6 600W and up to 3 PCIe 6-2 connectors for high-end GPUs
Dependable operation to support powerful GPUs
Stand-by drain of less than 0.15 watts
80 PLUS Bronze efficiency (up to 90.0 %)
5-year manufacturer’s warranty
Product conception, design and quality control in Germany
General
Model
System Power 11 550 W
Continuous power (W)
550
Peak power (W)
No
Form factor
Version 3.1
Form factor EPS 12V
Version 2.92
Topology
Double forward + DC-DC
Digitally controlled
No
Voltage (Vac)
200 - 240
Frequency (Hz)
50
Input current (A)
4
Power factor at 100% load
>0.98
Modern standby
Yes
Power consumption in standby (W)
<0.1
Average life time (h / 25°C)
>100,000
Operating temperature up to (°C)
40
Efficiency
80 PLUS certification
Efficiency (%) at 230V, 2% load64.4 Bronze
Efficiency (%) at 230V, 10% load 84.4 Bronze
Efficiency (%) at 230V, 20% load 88.6 Bronze
Efficiency (%) at 230V, 50% load 89.7 Bronze
Efficiency (%) at 230V, 100% load 86.6 Bronze
Fan and cooling technology
Cybenetics Noise Rating
No
Fan
Silence-optimized be quiet! fan
Fan size (mm)
120
Bearing technology
Rifle
Motor technology
4-pole fan motor
Max. fan speed (rpm)
1800
dB(A) at 10% load
10.4
dB(A) at 20% load
10.8
dB(A) at 50% load
11.0
dB(A) at 100% load
24.2
Output
Multi-rail operation (12V rails)
No
12V single rail operation
Yes
Overclocking key
No
+3.3V (A)
20
+5V (A)
20
+12V1 (A)
45.83
+12V2 (A)
no
+12V3 (A)
No
+12V4 (A)
No
+12V5 (A)
No
+12V6 (A)
No
-12V (A)
0.3
+5Vsb (A)
3
Max. combined power 12V (W)
550
Max. combined power 12V-2x6 (W)
300
Max. combined power 3.3V + 5V (W)
120
Hold-up time at 100% load (ms)
16.86
Hold-up time at 80% load (ms)
20.92
Power good signal (ms)
100 - 150
Cables and connectors
Modular cables
No
Sleeved cables
P24
Flat cables
P4+4, P4, PCIe, drives
Maximum cable length (cm)
55
Cable length to motherboard (cm)
79
No. of cables
7
ATX-Motherboard (20+4-pin)
1
P4+4 (CPU)
1
P8 (CPU)
No
P4 (CPU)
1
12V-2x6 cables
1
PCI-e 6+2-pin (GPU)
2
PCI-e 6-pin (GPU)
No
SATA
5
PATA
1
FDD (Floppy)
No
Protection
OTP (over temperature protection)
Yes
OCP (over current protection)
Yes
OPP (over power protection)
Yes
SCP (short circuit protection)
yes
OVP (over Voltage protection)
Yes
UVP (under Voltage protection)
Yes
SIP (Surge & Inrush protection)
Yes
Safety certification
BSMI
No
CB
No
CCC
No
CE
Yes
cRUus
No
cTUVus
No
CU
Yes
FCC
No
RCM
No
TUV
Yes
UKCA
Yes
IRAM
No
Environmental directives
ErP
Yes
WEEE
Yes
RoHS
Yes
Triman
No
Scope of delivery
Thumb screws
No
Screws
Yes
Cable ties
Yes
Velcro cable ties
No
User manual languages
No
OCK slot bracket with switch / OCK jumper
No
SFX-to-ATX adapter bracket
No
Casing
Dimensions without cable (L x W x H), (mm)
86 x 150 x 140
Weight (kg)
1.92
Color
Black
Logistics data and RRP
Dimensions, package (L x W x H), (mm)
268 x 195 x 97
Gross weight, package (kg)
2.3
Pieces per packaging unit
6
Dimensions, shipping box (L x W x H), (mm)
556 x 311 x 218
Gross weight, shipping box (kg)
14.9
Service
Warranty (Years)
5
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
This really works and tastes great
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
Top notch quality
The only brand I buy !!!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
Works well
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
My doctor encouraged my use of this product to lower my cholesterol. Okay, months later, no difference with cholesterol, but the produce makes elimination very very clean and I like that, so I still use this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
★★★★★ 5
Helps me a lot
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
Psyllium husk is a very necessary supplement and increases my daily fiber intake. It helps me use the bathroom consistently as it makes my bowel movements more regular. The taste of this is similar to orange juice and does not have a lot of sugar. I like putting this in my water every day. It is very easy to use and just dissolves in liquid. This large container will last me for over a month so it’s a great value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
“My Everyday Essential: Nourishment for Skin, Health & Wellness”
Size: 32 Fl Oz (Pack of 1)
I’ve been using Viva Naturals pure coconut oil every day, and it has truly transformed my routine. I love all things natural, and I use this oil in so many ways that it has become indispensable. I take three baths a day and then rub it all over my body; my skin has never felt so soft and hydrated.
In the mornings, I take a big tablespoon on an empty stomach, and sometimes I mix it into my smoothies with flaxseed and almond milk. I feel lighter, more energetic, and I know I’m taking care of my health from the inside out. For me, there’s nothing like pure coconut oil: it’s versatile, natural, and truly wonderful. I highly recommend it to anyone looking for a healthy product for their skin and daily wellness.H
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
★★★★★ 5
Ingredient for Bulletproof coffee, good stuff!
Size: 32 Fl Oz (Pack of 1)
Bulletproof Coffee. Dave Asprey. Look it up. This isn't his MCT oil, which I'm sure is spectacularly better, but I'll use the Pareto principle (80-20 Rule) and settle for a much less expensive version for a slightly lowered benefit. Perhaps I'll upgrade when I'm more of a genius and fabulously wealthy... ;)
So, I put this in my morning protein smoothie, which I make cold with pre-brewed coffee that is chilled...
Wait, what is MCT Oil? Medium Chain Triglyceride Oil. Basically, it is specially refined coconut oil, where they isolate only the MCT portion of the oil. I'll let you look up why medium chain triglycerides are fantastic. But they ARE fantastic! Worth the read.
So what does it do? Dave would say it is brain- fuel. Since our brains are made up mostly of fat, our brain naturally wants (healthy) fats for food. And MCT is some of the best possible oil/fat for that purpose. Plus, MCT has a benefit of being self-preserving, unlike many oils which go rancid (or oxidize) rapidly. Rancid oils are actually sort of toxic, in that they start to have damaging effects instead of beneficial ones. Kind of like the difference between eating a nice juicy steak...or 3 day old roadkill. And yes, I think that's an accurate analogy.
How did it work for me? Well, true enough, with the coffee and protein, I do have clear-headed mornings, and I feel energized (provided I get enough sleep the night before!). I have noticed that I don't seem to be hungry as early, and I attribute that to the "full" or satiation effect of the oil. Fats satisfy our hunger needs, because they are valuable to the body. (Even bad fats satisfy, but it's not good for us).
Will I buy this again? Absolutely. Probably have a bottle of this in my pantry forever now. And I also have virgin organic cold-pressed (I think) coconut oil as well, which I use for cooking, eating (straight), and use on my skin. MCT Oil is for eating (drinking) in my smoothie, as brain fuel.
I've never used Viva Labs before, but happy with them, and will be alert if they have other products I want. The bottle is high quality, and the cap stays tightly closed. Very pleased overall, everything is positive. Glad I chose them for this, and glad this does what I got it for!
Taste is faint, not very strong anything. Texture is like a thin mineral oil (viscosity if you want to be technical).
As a side note, if I needed a lubricant for the bedroom, I would grab this before the unrefined coconut oil. Not sure how it works with condoms, have not used this with them, so if you are relying on them and this, do your homework on compatibility...might eat some kinds or others.
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Reviewed in the United States on March 3, 2016