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Is it time to buy a new PSU?

post #1 of 13
Thread Starter 
Awhile ago my 12v was dropping to 11.36 quite often then all of a sudden it stops and goes back to running 11.8-12. The 3.3v rail was running ~3.4 sometimes going higher then 5%. In the last two days the 3.3v has started running around 3.05-3.2 causing asus probe to warn me it is lower then 5%. When I run OC'd or stock the same numbers. This happened before on the 3.3v rail then when I changed two fans it went back to normal. I tried plugging it into other wall sockets thinking that maybe something is off with my power in this room but same results in other rooms. Below is the pc. Has been together since early 2005 and running almost 24/7 whole time. I never remember having issues with voltages (they always stayed within %6) till around 4 months ago.

The PSU is a thermaltake 480w W0014. http://www.thermaltakeusa.com/produc...314/w00314.asp

It is powering 4x80mm fans, 2xDVD-RW, Asus p4p800 se, 4x512 ddr400, 3.0ghz prescott (3.72), xfx 6600gt, 74gb raptor, 300gb sata, 120gb ide.

If i need to replace my current pick would be a corsair 550vx.
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post #2 of 13
Software voltage monitoring is fairly unreliable. I have a feeling there is nothing wrong with your psu but for peace of mind get ahold of a multimeter if you don't have one and use and extra molex plug to test your voltages.
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post #3 of 13
post #4 of 13
Thread Starter 
i looked inside my case and one of my fans was not working so i looked at the plug and one of the yellow plugs was out of the connector. stuck it back in and 3.3v is normal.
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post #5 of 13
That'll do it. If a wire isn't plugged in all the way it can create extra resistance and the voltage will drop.
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post #6 of 13
Thread Starter 
well that worked till about an hour ago. now i got same issue but this time there is no loose wire. i tried unplugging those fans completely just to make sure and nothing changed. no other wires were loose in the plugs that I can remember. I did unplug two HDD, Vid, and MB connectors last night but nothing there was loose. this is pretty odd b/c last night i could pull the yellow wire that was loose and watch the voltage drop then plug it in and get instant rebound. now doesn't even matter. not sure what else to check and kind of scared that if i do buy a psu the issue might still be here.

Maybe I should just plug up the bare essentials and turn it on and see what happens?
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post #7 of 13
I still think you need to test with a multimeter to see if there is even a problem in the first place. The sensors in the motherboard can be affected by many things, causing them to not be accurate. There is a good chance the values aren't representative of what the psu is putting out. If you don't have a multimeter, there has to be a friend or a family member you can borrow one from.
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post #8 of 13
Thread Starter 
i just unplugged the MB and plugged it back and now its fine. it's either the bios/software monitoring or me not hooking things up tight enough. the MB temp jumps 7C when it happens too making me think it's more of a monitoring issue. so i guess i will just unplug a few things and plug it back up when it does it from now on since the values not right kind of bugs me even if i know they are right but reported wrong. was getting a multimeter a few hours ago but found out my money still not in my checking account so that's gotta wait till tomorrow.
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post #9 of 13
I'd hate for you to go buy a multimeter just for this. If you do get one a cheap digital one will be good enough to do the job. I think I got mine for ~$15 a few years ago.
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X25-M 80GB, 320GB WD Scorpio Black Vista x64 2007FP-3007WFP-2007FP-1080p 32" OCN Ducky Brown 
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post #10 of 13
Thread Starter 
well it's more like replacing the one we had that is now broke. i have a few old school beetles as weekend toys that are in dire need of some electrical work. probably come in handy there.
45nm Quad
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Some Cardboard boxes 
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45nm Quad
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CPUMotherboardGraphicsRAM
Q9300 3.3 (Lapped) DFI LP DK X38-T2R 2 Visiontek 3870s 2x2GB GSkill ddr2 1000 
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Some Cardboard boxes 
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