Review be quiet! Straight Power 11 650W Platinum Power Supply Review - Tom's

[UsandThem]

https://www.tomshardware.com/reviews/be-quiet-straight-power-11-650w-platinum-power-supply-review

Looks like a decent unit overall, and is made by FSP. It doesn't really "win" in the various tests, but is pretty quiet. The problem is, it only has a 5 year warranty, when its direct competition (Seasonic and Corsair) offer units that are just as quiet, but offer better overall performance, and much longer warranties (10+ years).

I will say that I really do like the look of be Quiet power supplies, as the grill really makes the unit stand out.

 

[Janooo]

Hi all,
a question based on the link above:

Power Specifications

Rail	3.3V	5V	12V1	12V2	12V3	12V4	5VSB	-12V
Max. Power	Amps	24	24	18	18	22	22	3
54.1
Watts	120	649.2	15	3.6
Total Max. Power (W)	650

If the PS is going supply power to Ryzen 9 3950x then what numbers are supplying power to the CPU?
Is it 3.3V or 5V or both ...
The 120Wats is for 3.3V and 5V, correct?
3.3 * 24 is not enough for the CPU correct?

How does this work?
Thanks,
Jano

 

[Janooo]

Here are the CPU currents at the bottom of the image.
How was the CPU current measured/calculated?

 

[UsandThem]

Here's a quick and dirty PSU rail explanation, but in short that PSU will have no problems powering that CPU.

https://www.gamersnexus.net/dictionary/6-psu/47-rails-psu

 

[Janooo]

Would PS with 3.3 - 25A, 5 - 20A (that's 120W) be enough for the 3950x?

 

[UsandThem]

Would PS with 3.3 - 25A, 5 - 20A (that's 120W) be enough for the 3950x?

What model?

There are some junk power supplies out there, but pretty much any quality 650w+ unit out there will be fine. The only thing to consider is some 650w units and below only come with one EPS connector (2 x 4-pin), whereas some of the newer power supplies have begun to include the additional 4-pin EPS connector. In the past, pretty much a person had to go with with a larger (750w and up) to get the additional CPU connector.

If I were buying a 3950x, that additional 4-pin EPS connector would be something that I would want. Some motherboards are fine without it, but there are several users I've seen here who weren't able to start their system without that additional EPS connector plugged in.

Plus, the 3950X isn't overly demanding: https://www.tomshardware.com/reviews/amd-ryzen-9-3950x-review/2

 

[Janooo]

Would this PS work?
Corsair CX-M Series CX550M 550 Watt 80 PLUS Bronze Certified Power Supply (CP-9020102-NA)

 

[UsandThem]

Would this PS work?
Corsair CX-M Series CX550M 550 Watt 80 PLUS Bronze Certified Power Supply (CP-9020102-NA)

It should (depending on the rest of your setup & motherboard EPS requirements), but I have to ask why spend $700+ on a CPU, and not get a better gold rated (or even platinum) PSU? If you want to stay with Corsair, the RMx series is really good. I know PSU availability isn't the greatest right now, but if you watch you should be able to snag something.

 

[Janooo]

Just 1030 GPU, 1TB NVMe, that's it, for a couple of VM's.

 

[Janooo]

Hi,
a quick update, the PS works fine for me.

When I asked:

Would PS with 3.3 - 25A, 5 - 20A (that's 120W) be enough for the 3950x?

I did not realize that EPS12V 2.92 power (for CPU) comes actually from +12V - 45.8 A and it is more than enough for my setup, my GPU is 1030, this is not a gaming PC.

Corsair CX-M Series CX550M 550 Watt 80 PLUS Bronze Certified Power Supply (CP-9020102-NA) specs:
Output Voltage +3.3, +5, ±12 V
Power Capacity - 550 Watt
Specification Compliance - ATX12V 2.4/ EPS12V 2.92
Output Current
+3.3V - 25 A
+5V - 20 A
+12V - 45.8 A
-12V - 0.8 A
+5VSB - 3 A