PSU 12V rail outputting lower voltage during heavy load

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johnx125

johnx125

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Oct 10, 2017
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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.
 
Solution
J
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).
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jay32267

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Mar 16, 2017
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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).
 
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Solution
johnx125

johnx125

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Oct 10, 2017
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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?
 
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johnx125

johnx125

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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.
 
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johnx125

johnx125

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Oct 10, 2017
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Ok then I guess I should get a new PSU. Thank's for your help! :)
 
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