5v voltage problem

[Dlget]

Hi,I'm getting low voltage from my smps.at +5v I'm getting 4.4v.
Although this is not always & some time I get 5v sometime I get 4.4v or 4.6v
Anything above 4.5v is okay for my mobo but at 4.4v it shows warning.

This is occurring since yesterday. I also got 4-5 system crash may be due to under voltage surge protection.
As I don't know the reason now I'm not turning on my pc

My spec
Mobo-asus p8z68 v pro gen 3
Smps-corsair vs650
Ups-i ball 1100VA
i 5 2500kk


So what may be the reason of system crash?Is it as I said under voltage protection??()
My smps is just 2months old.
I doubt if its faulty after 2month.

 

[Emerald]

The Corsair VS falls under our Tier4 category.

These PSUs are built down to a low price. Not exactly the most stable units ever created. Very basic safety circuitry or even thin gauge wiring used. Not for gaming rigs or overclocking systems of any kind. Avoid unless your budget dictates your choice.

I would recommend to test with a different PSU. Preferred would be a Tier1 or Tier2 PSU from this list:
http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

 

[Dlget]

can a bad grounding can cause this???
cause i'm getting 4.480v & after crash i got perfect 5.080v

What can i do to test PSU before taking it for RMA???