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Hi bitcointalk community,

I have been reading a lot about Power Supply Unit (PSU) and I don't understand why there's such pricing discrepancy. Let's take a 1300 W PSU 80+, the price goes from $517.05 CAD to $1,954.50 CAD from different makers on Newegg Canada. https://www.newegg.ca/p/pl?d=1300+Watt+power+supply (https://www.newegg.ca/p/pl?d=1300+Watt+power+supply)

Since I started to mine, I always bought EVGA PSU, never had issues. I know the efficiency is a big factor. What else, mean time between failure (MTBF) ?

Thank you

I didn't even think about it, but I don't buy PSUs over $ 200.
EVGA PSUs come with a 3 year warranty and I use CORSAIR PSUs with a 10 year warranty.

CORSAIR RMx Series (2021) RM850x CP-9020200-NA 850W ATX12V / EPS12V 80 PLUS GOLD Certified Full Modular Power Supply
https://www.newegg.ca/corsair-rmx-series-rm850x-cp-9020200-na-850w/p/N82E16817139272
2 of these PSUs will be better than 1 single EVGA 1300W PSU and much cheaper.

Get server psu very cheap 1200-1400w platinum rate :) i have dell and hp psu and very happy. i dont what price they are right now but i got them for 20-30$ each.
server psu can get louder if you load them more 50-60% load.

Server blocks are also very expensive now.
Server blocks do not work well at undervoltage,
and the power supplies that I talked about work perfectly both at an increased voltage of 240 volts, and at a reduced voltage of 180-210 volts. This is standard practice in the village.
A stabilizer is required to use server power supplies.

Great recommendation thank you!

That's pretty much why I am asking why there's such pricing discrepancy?
20-30$ VS 300$ ???

Because these server psus are not new. Who knows how many years they been working 7/24.

Haaa okay good to know!

And also on a server PSU, in most of the designs you will need to provide power to the server PSU manually by pressing a button. This makes the starting of the rig more problematic especially when the system is intended to run remotely, without direct access and supervision.

https://i.imgur.com/uCDMIf6.png

This is exactly what I was thinking so you buy it for $20 but it can die the following week especially if they were used 24/7 for the last years to mine.

No you dont need manually switch on off. Many breakout boards have molex or hdd wire input, so when regular psu starts server psu starts too. I use regular psu+server psu with breakout board,
By the way i dont recommend server psu for expensive cards like rtx3000 series and for radeon 7. If you have expensive rig then dont rely on server psu.

So far non of my server psus dead. Im not loading then 100%. 700-800W load which makes like 60-70% load and they are cool.

The EVGA PSUs i have all have 10 year warranty.  Ive yet to need to use one yet and several are now over 6 years old.

https://www.evga.com/products/product.aspx?pn=220-P2-1200-X1

I use those as the ATX on a rig and server psu for any additional need. 
I do have a couple of kkmoon 2400w dual server psus that have all atx hookups.  They work nice for $299 when i got them years ago.

Depends on the sellers, I don't buy anything over 200$ for a single power supply, some sellers are too greedy that they sell a particular PSU for a too high price, make sure you search for other online stores for that same PSU you eyeing for better price

Noted, thanks for the advice!