Gotta love your comments 
All this is 220V so the PSUs are more efficient.
600 watts was lying around, I pulled power and data off one blade and it powers 2, and yes, didn't work for even 1 for more than an hour.
The list of known working PSUs started with 650 for 3 blades, so why wouldn't I try 600 with 2?
1000 watts didn't work with 3 for more than a day, well, it didn't work with 2 blades nor 1 blade either for more than a few minutes. The PSU didn't die, the Avalon did.
800 watts worked fine with 3 for me for more than a week.
So, if 800 is underpowered, why did the 1000 watt PSU die after a day and the 800 work for a week?
All this is 220V so the PSUs are more efficient.
600 watts was lying around, I pulled power and data off one blade and it powers 2, and yes, didn't work for even 1 for more than an hour.
The list of known working PSUs started with 650 for 3 blades, so why wouldn't I try 600 with 2?
1000 watts didn't work with 3 for more than a day, well, it didn't work with 2 blades nor 1 blade either for more than a few minutes. The PSU didn't die, the Avalon did.
800 watts worked fine with 3 for me for more than a week.
So, if 800 is underpowered, why did the 1000 watt PSU die after a day and the 800 work for a week?