how do i know if my PSU bad?
how do i know if my PSU bad?
how can i use this multimeter to check the PSU?(what wires to check and what their voltages should be)
-Austin
Screamin' BCLK:
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
Screamin' BCLK:
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
Re: how do i know if my PSU bad?
Connect the black lead to one of the black slots in the end of a molex connector and the red lead in either the red or yellow slot on a molex connector of your PSU to test the 5V or 12V rails.
To test the 3.3V rails put the red lead into the one of the orange slots on the 24-pin power connector.
To test the 3.3V rails put the red lead into the one of the orange slots on the 24-pin power connector.
There is no theory of evolution. Just a list of animals Chuck Norris allows to live.
Re: how do i know if my PSU bad?
cool! 11.90 V on the 12V rail, and 4.90 on the 5V 
i was expecting it to be way off
-do i check the 3.3 by unplugging the main connector and testing it without turning it on, or do i have to jump the PSU?
i was expecting it to be way off
-do i check the 3.3 by unplugging the main connector and testing it without turning it on, or do i have to jump the PSU?
-Austin
Screamin' BCLK:
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
Screamin' BCLK:
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
Re: how do i know if my PSU bad?
just stick it down in from the top of the plug.
like this,
like this,
- psu test.jpg (43.9 KiB) Viewed 3982 times
"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."
-Thomas Jefferson
-Thomas Jefferson
Re: how do i know if my PSU bad?
ok, it said 3.23 on the 3.3V rail
so is a PSU fine as long as it is +/- .1V, or should it be even closer than that?
so is a PSU fine as long as it is +/- .1V, or should it be even closer than that?
-Austin
Screamin' BCLK:
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
Screamin' BCLK:
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
Re: how do i know if my PSU bad?
When you checked the voltages was the PC idle or at full load? If they were at idle, check them again with the PC under load. Put under a load and see where you are at.
"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."
-Thomas Jefferson
-Thomas Jefferson
Re: how do i know if my PSU bad?
It works in percentage tolerances.
The bare minimum is 5% and most good manufacturers go to 3%. And the really good supplies are tighter than 3%.
so for 5% they have to be between:
12v: 11.4v <--> 12.6v
5v: 4.75v <--> 5.25v
3.3v: 3.135v <--> 3.465v
And for 3% they can be between:
12v: 11.64v <--> 12.36v
5v: 4.85v <--> 5.15v
3.3v: 3.201v <--> 3.399v
Dan
The bare minimum is 5% and most good manufacturers go to 3%. And the really good supplies are tighter than 3%.
so for 5% they have to be between:
12v: 11.4v <--> 12.6v
5v: 4.75v <--> 5.25v
3.3v: 3.135v <--> 3.465v
And for 3% they can be between:
12v: 11.64v <--> 12.36v
5v: 4.85v <--> 5.15v
3.3v: 3.201v <--> 3.399v
Dan
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