Hi guys!
I ordered myself a couple too.

I
Tell me please, standart PC power supply 850W is enough for L3+ ? (220volt line)
No.
Just buy the APW3s at the same time you order those L3+ s.
Actually, you need to order the PSU's 2-3 weeks before....it has been the case they arrive after your L3+ or D3
I just sent 2 to a buddy who will send me the 2 he eventually will get back to me ..( I finally wised up and now always get spares on any order in case)
cluster city on psu's