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Does anyone know the max power for the built in PSU on the Whatsminer M20S? Can these machines be overclocked?

68T is not enough ;D

Make sure to show us  the fire  or meltdown   you make with that. ;D

If you have the P20 it's rated to 3350V. Not positive what the other models are rated for, I think it's labelled the P21.

Not sure how you plan on overclocking the machine, it doesn't have firmware with additional power modes as far as I know. I'm still looking for a LP version

I think he was being funny or sarcastic.

Do you have a watt meter?

How much watts it uses in real environment ?

they have changed the PSU and replaced it with a 3600 W model. I think it can be overclocked.. umm.. not really overclocked but more fine tuned since on some machines there is a difference in frequency between boards.
SM0 638
SM2 682

the miner is totaling of 67.3T

probably it is possible to get better hashrate if setting by board frequency since the auto tuning on startup is not "fixed" by board, but the total average seems to be the same.

tried logging in with putty SSH like the S9, but it's not connecting.

Humm, you think they closed SSH like Bitmain does?
With fixed frequency for sure its possible to give some more TH, but you need to be carefull try to see how much is consuming now with 67.3 TH, do you have a Watt meter?

These units can not do 3600 watts with any margin of safety.

How many watts are it using with 67TH ?

C19 / c20 rate for 16 amps 24/7/365.

3600/16 = 225.00.


 Translation  once volts are under 225 you are exceeding safety margins.

I have been mining since 2012 and from experience I can tell you running above max amps = melt down in under a month on lots of different cables.

I can also state running right at amp max spec = melt down in 2-4 months.

Running under max amp spec more often then not works. Long term.

This gear needs to run for a year or more.

Over clocking is basically stupid as fuck.

I would prefer this gear to do 60th and use 2900 watts.

I have three of them and have large fans blowing air on them. Since I fear they will over heat.

measuring in A here, the highest is 14.2A for units that are hashing at 68.4 on average.
Units hashing at 67.8 on average are sucking 13.9A.

This was for the 65 TH model, but gives an alright example of what to expect when considering advertised specs. There is always some variation - [Review] Whatsminer M20S 65 TH (https://bitcointalk.org/index.php?topic=5164371.msg51793324#msg51793324).


I didn't run into any issues this summer it was a cooler one though, nothing higher that 34C. I do poke every now and then looking for LPM to be added, especially as I do want to place this in the basement in a couple weeks. Worst case I just have to go extra hard on the soundproofing.

yes and while it most likely can do 14.2a for months it is very close to the "safe" number of 16 amps

Good quality cords are extremely important.

And many farms are 208 volts 3 phase.  We are that in Clifton NJ  but we drop to  as low as 187 volts when there is an external demand on the transformers  once or twice a month in the summer.

So these monster units are a bitch for us.  you don't really save much  if the unit is 68th vs 60 th  but you get so much more durability and less stress on the gear with a setting like 60th and 2850 watts.

asic builders don't care if the gear burns out on you.

The best wire I found to use with these is this one.

https://www.amazon.com/NEMA-L6-30P-C19-Power-Cord/dp/B004WOE85S