5v dropping fast

[ColdFlare]

My 5v line is dropping really fast. Last month it held steady at 5.00v at 2.15 vcore. In that past month I changed the fan in the power supply to a panaflo low 20 cfm from a adda 35 cfm.

Is it cause my fan is not cooling the psu enough that its dropping?

I am now running at 1.75vcore at defaul speed and its holding steady at 4.97 now.

 

[Crazy Jayhawk]

Do you still have the fan that you took out of the PSU? Try putting that fan (or one with a similar CFM) in the power supply. If the problem goes away, then you know the cause.

 

[ColdFlare]

yea, I could do that, but I was hoping for someone with this kind of experience to tell me.

If I do put the fan back in, that means I have to take out the old soldering iron.

 

[Crazy Jayhawk]

For the test you could just twist the wires together and put electrical tape over them. It's not a permanent mod, and doing it that way makes it faster and easier.

 

[ColdFlare]

Well I actualy devised a better way, and let it sit at low voltage with my windows opened. Case tmpe dropped dramatically.

But voltages stayed the same. I am pretty sure my psu is dying now, either that or my mobo simply cant handle the voltage anymore.

 

[ColdFlare]

Oh yea I forgot to mention how low it got. It got to 4.5-4.75 volts on load at 2.15 volts.

 

[ColdFlare]

Update...

Well I found the problem. Seems that my pp412x antec power supply with my pots adjusted and runing at 2.15v for over a year has put a strain on the atx connector. The Connector has burned. One of the connector plastic holders has completely broke off and melted into the motherboard atx connector. I was able to salvage whatever I can of the power supply.

Upon further inspection all the charred and blackened connectors were all +5v. Only one wasnt giving power correctly. I took some pliers and some needle sized screw drivers and cleaned out the connectors.

Then I had to re-tightened the connectors. They now transit correct power. Although, this may be a temperory fix, I hope it lasts.

I can see myself buying a new power supply and motherboard in the future. I just blame myself for not seeing this earlier.

Let this be a warning to all the other people who have modded the pots in the antec pp412x 400 watt power supply, to have a boost in the 5v rail, don't leave it at this setting unattended. Another way I found out it was the connector were because the wires to the atx connector were really warm.

So better check it before its too late. I hope this saves some power supplies and motherboards.