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PSU 12V rail outputting lower voltage during heavy load

Lately I've noticed that my PSU's 12V rail only outputs around 11.7V or 11.6V while the PC is under load and, the heavier the load the lower it gets. When the PC is idling the 12V rail is steady at 12V but as soon as launch a game the voltage drops to 11.7 - 11.6 volts. Also could this cause the system to crash and lock up? Because recently I encountered a complete system lock up while I was playing light game. I don't know...what do you guys think.. should I be looking for a new PSU?

P.S.:I used HWInfo64 for monitoring the voltages.
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  1. Best answer
    PS voltages should be within +/- 5% of nominal except the -12V which can be +/- 10% (so I've read). You are getting on the low end of 5%. 12.4 would be 5%. I would be looking for a new PSU and I'd up the wattage. More wattage is ALWAYS good because you stress the components less (this is always the case).
  2. What PSU is it?
  3. jay32267 said:
    PS voltages should be within +/- 5% of nominal except the -12V which can be +/- 10% (so I've read). You are getting on the low end of 5%. 12.4 would be 5%. I would be looking for a new PSU and I'd up the wattage. More wattage is ALWAYS good because you stress the components less (this is always the case).


    The funny thing is that this PSU is actually overkill for my system. It's an 850W PSU on a system with an AMD FX-8350 and a Radeon R7 370. 650W would be perfect. So in case I get a new one I might get one with less wattage. Anyway could a lower voltage from the 12V rail result in a system crash?
  4. jankerson said:
    What PSU is it?

    It's a modular 850W 80+ Bronze PSU but it's from a manufacturer that you've probably never heard of because it only exists in my country, Greece. So basically it's made and available in Greece only.
  5. Yes. A lower voltage on the 12 V rail can cause a crash....and it only needs to be very short in duration.
  6. jay32267 said:
    Yes. A lower voltage on the 12 V rail can cause a crash....and it only needs to be very short in duration.


    Ok then I guess I should get a new PSU. Thank's for your help! :)
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