PSU 12volt line over volting? Tags: Power Supplies Graphics Cards Motherboards Components Last response: July 9, 2009 8:54 PM in Components Share jbaldachino July 6, 2009 5:26:29 PM I tried to search for this but was having trouble coming up with any good search terms, so my apologies if this has been answered elsewhere. My motherboard is reading my PSU 12volt line at 12.5 volts. I was having some difficulty with my graphics card (which is now in RMA) and one of the problems the EVGA techs suggested was that my 12v was running way too high at 12.5 volts. I've done some google searches and can't really find any information on this. I wouldn't trust any body at the PSU company anyway. Is 12.5volts too high? I know motherboard readings are not the most accurate, but I'm consistently reading between 12.48 - 12.52 volts. My PSU is here: OCZ ModXStream Pro 700 Watts http://www.newegg.com/Product/Product.aspx?Item=N82E16817341018 Should I be worried? More about : psu 12volt line volting | E-mail me updates | Report abuse Register or log in to remove clarkjd Power supply Expert Graphics card Authority Motherboard Expert July 6, 2009 5:57:06 PM The ATX spec states that the voltage should be 12 volts plus or minus 5%. That means that anything between 11.4 and 12.6 volts meet the spec. While 12.5 is a little high, it is within the specification. | Report abuse theAnimal Power supply Expert July 6, 2009 6:35:46 PM Measure with a DMM if you want to be sure. | Report abuse jsc Power supply Master Graphics card Authority Motherboard Master July 7, 2009 3:40:00 PM What kind of problems were you having with your video card. | Report abuse Related ressources Stupid question about 12volt rails. - Forum Why your 12-volt video card won't run. - Forum 12-volt card problems part II - Forum PSU for GTX 660 SC Signature 2 (24A on + 12Volt rail) - Forum 10.30v on + 12volt rail - Forum Ask the community Publish jbaldachino July 7, 2009 8:07:57 PM Initially none. After two days, major instability (no changes) and constant bluescreens with failure to reset device drivers or something along those lines. After such a dump, could not log into Vista 64 (could get to the user-selection screen, no further). Could boot fine into safe mode or with the card removed and using the on-board. By the end of the day, with the card installed, I was artifacting immediately on boot. | Report abuse jbaldachino July 9, 2009 2:33:49 PM BTW, I tested the 12volt lines with a digital meter today. I'm reading 12.4 volts at idle. The EVGA guy really seemed to think 12.4 was a huge problem, but I cannot find anything elsewhere claiming such. Any thoughts? | Report abuse theAnimal Power supply Expert July 9, 2009 7:57:00 PM 12.4V is well within spec. (11.4V to 12.6V) | Report abuse jsc Power supply Master Graphics card Authority Motherboard Master July 9, 2009 8:38:14 PM I doubt if the PSU is your problem. | Report abuse jbaldachino July 9, 2009 8:54:09 PM Thanks a lot guys. | Report abuse Register or log in to remove Ask the community Publish Tom's Hardware>Forum>Components>PSU 12volt line over volting?> Related ressources: ForumHow can I tell which 12volt rail is being used? ForumCan I use a 4pin 12volt in an 8pin slot? ForumCan cpu or a8v mb fry if 4-pin 12-volt power not connected? ForumVoltage on the 12volt rail Forum12volt verses no 12volt plug ForumPSU over volting / causing graphic issues? ForumCan I mix 12Volt rials on 2x SLI ? ForumPSU getting so hot that it shuts down computer ForumRadeon HD 5770 on 25 amp. on 12volt rail? ForumPower Requirements and Specs For Popular Graphic Cards Guide ForumPSU blew up ForumLook over these specs, any problem? ForumCoolerMaster V8 clicking/flapping ForumIs my PSU My problem??? ForumAntec 902 Gaming Rig Build/PSU Suggestions? More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !