Cooler Master X Silent Edge Platinum 850 W

[_roman_]

My use case for zero psu noise is a quiet room.


It's not a car where I enjoy the vibration, sound noise and other noises.

 

[Mack4285]

I have had a passive Seasonic for many years. Might get a new one soon, and always good to see more alternatives. I like zero noise and knowing there is no movable part (the fan) that can break.

 

[Nostras]

I have had a passive Seasonic for many years. Might get a new one soon, and always good to see more alternatives. I like zero noise and knowing there is no movable part (the fan) that can break.

If you want a silent PSU you're (imo) just better off getting a very premium power supply with proper fancontrol. Get something A++ Cybenetics rated and preferable something overkill or, even better, check the profile as reviewed by Cybenetics and base it off that.

One good example is the Cooler Master X Silent Max Platinum 1300, https://www.cybenetics.com/evaluations/psus/2493/.
This thing is silent until you pull 1150W or so and will handle anything you throw at it for about the same price.

 

[Shrek]

One good example is the Cooler Master X Silent Max Platinum 1300, https://www.cybenetics.com/evaluations/psus/2493/.
This thing is silent until you pull 1150W or so and will handle anything you throw at it for about the same price.

I doubt it run silent till 1150W unless taking advantage of the computer case fan.

 

[Asni]

The price difference between the 850 and the 1100w is 50€.

 

[Nostras]

I doubt it run silent till 1150W unless taking advantage of the computer case fan.

I mean it states this has been tested at an ambient temperature of 30-32°C but not for how long.
30°C is very high for an ambient temperature considering 20°C is more realistic.
But they say nothing about for how long so... question mark?

 

[Shrek]

As jonneyGURU said

"Whereas, Zero RPM fan mode will wait until there is so much heat to dissipate, the fan kicks on at 400W and the air coming out of the back can be used to melt heatshrink tubing."

TechPowerUp is Hiring a Power Supply (PSU) Reviewer

Thermal energies make it easier to overcome the diode drop, and so increase efficiency. voltage - Why does temperature modify the characteristics of a diode? - Electrical Engineering Stack Exchange So, a hot diode has higher efficiency. Your attention is focused on wrong quadrant :roll...

www.techpowerup.com

 

[dirtyferret]

I mean it states this has been tested at an ambient temperature of 30-32°C but not for how long.
30°C is very high for an ambient temperature considering 20°C is more realistic.
But they say nothing about for how long so... question mark?

30c is normal for a chamber, when I ran two walk in chambers they stayed at 30c simply from the lights (pre-LED) even with the door wide open
via cybenetics
We measure the fan's noise from one meter away, inside a hemi-anechoic chamber whose internals are entirely covered in specialized soundproofing material. Background noise inside the chamber is kept below 6 dB(A) during testing, with humidity being close to 50%. We should stress however that to obtain the fan speed results we apply the same conditions with our efficiency readings (operating temperature >30 °C) and we take the fan's output speed throughout the PSU's entire operating range. This allows us to calculate the unit's overall noise output and provide the corresponding Lambda certification.

 

[Easa]

I have bought this PSU in the EU (1100W) variant. Yes, it is ultra niche and also overly expensive. It is a dumb buy. It is also completely inhouse designed and manufactured in Taiwan, a cooperation effort of CoolerMaster and Infineon.

Feeds Core 9 Ultra 285K, RTX 5090 (on the way, there is a substitute inside currently), 21 fans at ultra low RPMs, two D5s and an array of five Optane 905P drives. The machine is inaudible during the usual work and gaming and extremely silent during ultra heavy loads. I have developed a strong hatred for PSUs that do this "swoosh" sound every time a fan spins up. This is what I was looking for.

Very happy with the result, would buy again.

P.S.: My friend has this SeaSonic Fanless 520W PSU that he owns from maybe 2013-14. Thing has endured 10+ years of everyday service under multiple configurations, currently on the most recent build with Ryzen 7 9700X + RTX 4070Ti Super. I would like to stick to my CM in a similar way, given the standards or connectors will not change.

 

[lexluthermiester]

in house OEM built by CM

This is an impressive aspect.

Despite the ripple, this is an excellent performing PSU, even at that price.

 

[dirtyferret]

This is an impressive aspect.

100%

 

[progste]

it's a really cool piece of tech, but in most cases having a decent fan that's not too loud is just better.

 

[steamrick]

I've actually bought the 1100W unit.
I had the Seasonic 600W fanless before and I've been waiting for a passively cooled ATX 3.x PSU to replace it so I'm not at razor's edge with my 4090. The 700W fanless wasn't a worthwhile upgrade in that situation.

I see two usecases for a PSU like this:
1) Enthusiasts like me who have a custom watercooling loop that allows for a dead silent system at any load (yes, I managed to silence the pump)
2) Hardware reviewers who do noise measurements in an anechoic chamber. Being certain that there is no PSU fan that could possibly kick on is useful in that scenario

Yes, it's ultra niche. Which is part of why it's so darn expensive, because there's no production at scale. I think that's perfectly fine, though - I'm just glad that it exists at all.

I expect that there's significant overlap between people who buy this and people who buy the MoRa IV 600 (though I'm sticking to my MoRa 3 420... for now...)

cooler master X silent Max platinum 1300w is $100 cheaper on amazon, it's the same platform they just removed the fan and called it passive

Not quite. They also replaced some of the heat sinks with larger versions that'd collide with the fan on the 1300W.

It's a small change, but it's there.