is LC Power LC5550 silent v2.2 550W enough for my pc?
Wattage wise? Yes.
Build quality wise? No. Not even close.
LC-Power is one of those brands that produce junk PSUs. If you want good quality, look towards either Seasonic Focus/ PRIME series, or Corsair RM/ RMi /RMx series.
(All three of my PCs are also powered by Seasonic, full specs with pics in my sig.)
Btw, since PSU powers everything, it is
the most important component inside the PC and if you do care about your PC, never cheap out on PSU. But if you don't care about your hardware and are fine when PSU fries everything it is connected to, when it blows up - feel free to use that junk of a PSU.
For example, that doorstep claims to be 550W unit, but when you look at it's specs,
link:
https://www.lc-power.com/en/product/archive/pc-notebook-psus/lc5550-v22/
It has two +12V rails, one producing 216W and another 240W, with "combined" power of 400W. Now, you can't combine rails and what it essentially is, is 240W PSU. E.g you can not power a GPU that is 300W off from single 12V rail. At best, the PSU is 400W unit, and not 550W unit.
Also, there is 0 word on how long of a warranty it has. Or does it even have any. But due to the EU laws, it must have 2 years of warranty, else-ways, it can't be sold in EU.