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fixed 5 volt problem with epox 8k5a3+

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Default

Disabled
Joined
Oct 8, 2001
Location
CANADA!!
just fixed my 5 volt line last night and it turns out most of te problem was the motherboard. I attached the 5 volt lines directly to the 5 volt mosfets and it solved it for good.
 

SolidWolf

Member
Joined
Dec 9, 2001
what was the problem? cause i have the same mobo and no problems here.. unless i havent noticed..
I do have a 550 psu and my 5v line is just around 4.92 top and has gone to 4.87 min.. which i find LOW.. is that the same problem?
 

rogerdugans

Linux challenged Senior, not that it stops me...
Joined
Dec 28, 2001
Location
Corner of No and Where
Most likely it was the same;)

Epox boards are known for being very 5v hungry, and add in the sensitivity that AMD chips have for 5v power......often adds up to low overclocks or even instabilty at defaults!

The mosfet mod is great, and helps a lot IF you have low 5v readings in bios or software but a good reading using a multimeter at one of the molex connectors.

Sometimes the ATX connector is the problem- if so, it can sometimes be fixed by cleaning up the contacts and tightening them up a bit.

My 5v lines were decent when I did the mod, but post-mod I see much less fluctuation in the readings than before.
 
OP
Default

Default

Disabled
Joined
Oct 8, 2001
Location
CANADA!!
from what i have learned there is too much resistance between the atx connector and the mosfets, so you simply just bypass that circuit :D
 

Robbie

Member
Joined
May 9, 2001
Location
A hot spot in Ca
I'd assume the traces on the boards are not thick enough. I think it would be a good idea to check and see if they are getting HOT after a while of the computer being on.
Rob
 

ZeroKelvin

Member
Joined
Aug 6, 2002
Location
Memphis
For us dumb people that don't know what or where the mosfets are....can you please give pictures or details as to how the 5v mod was done.

Thanks
 
OP
Default

Default

Disabled
Joined
Oct 8, 2001
Location
CANADA!!
found another factor in the voltage loss on the 5v line. Seams that the mosfets are also getting too hot and the heat just adds to the resistance.