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I think my PSU is dead

post #1 of 12
Thread Starter 
I'm pretty sure my PSU is in dire need of replacing, but I'm afraid I'm missing something. This is a 10-month old CS450M powering a 260X and an FX4100 as well as 5xHDDs (4x2TB Greens and a 2.5" laptop drive). The computer will "crash" but the files are still mostly accessible via Kodi but physical access, teamviewer, and RDP dont work.


Edited by victorzamora - 1/26/16 at 5:09am
 
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post #2 of 12

For the future, please "Insert" screenshots; don't "attach" them. It's far less convenient when they are attached because I first have to click the image and then I have to open it.

 

Anyway, software is completely unreliable for reading PSU voltages; you need a digital multimeter for that. Also, if your +12V were really at 9V, then the computer wouldn't even be functioning. It wouldn't even be on.

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It's a computer!
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post #3 of 12
Thread Starter 
Good call, I thought I was "Inserting" and not "attaching" but that's what I get for posting while half-asleep. It should now be "inserted" and easier to see. I'll check the PSU tonight with a multimeter, but as I can't load it while checking the voltages what should I expect to see? I'm guessing I just short Pins15&16 (or whatever numbers the usual ones are) and then the negative probe goes to any black and I just read off all of the "power" values and reference them with a 24-pin template? But what should my multimeter read for the +12V, for example? Also, is testing just the 24-pin enough or should I check all of the cables?
 
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post #4 of 12
Quote:
Originally Posted by victorzamora View Post

Good call, I thought I was "Inserting" and not "attaching" but that's what I get for posting while half-asleep. It should now be "inserted" and easier to see. I'll check the PSU tonight with a multimeter, but as I can't load it while checking the voltages what should I expect to see? I'm guessing I just short Pins15&16 (or whatever numbers the usual ones are) and then the negative probe goes to any black and I just read off all of the "power" values and reference them with a 24-pin template? But what should my multimeter read for the +12V, for example? Also, is testing just the 24-pin enough or should I check all of the cables?

 

I confess that I don't know how to use a multimeter. Here are the maximum tolerances for ATX spec though:

 

https://en.wikipedia.org/wiki/ATX#Power_connection_to_the_motherboard (scroll up until you see the chart - they don't have an anchor link to it)

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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #5 of 12
Thats a single rail 12V PSU so any molex connector will work for testing the 5V and 12V rails. Black lead from MM in one of the end pins on a molex connector and the red lead from the MM into the 5V (red)or 12V hole (yellow) in the molex connector. Just make sure its on DC voltage which is usually indicated with a flat bar above the V vs a ~ above the V for AC. It can be tested while the PC is running.
post #6 of 12
Thread Starter 
Okay, so my voltages are: 3.34, 5.11, 12.13, and -12.62 on my Fluke. However, this isn't under load and I certainly can't measure anything fancy like ripple. It seems that all of them are well within spec. I don't know if there's a vdroop with significant load, but we'll see. Seeing that, I pulled out one of the RAM sticks (randomly) and put the remaining one in another slot (2x4GB kit, 4 DIMM slots). We'll see what happens.
 
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post #7 of 12
Quote:
Originally Posted by victorzamora View Post

Okay, so my voltages are: 3.34, 5.11, 12.13, and -12.62 on my Fluke...

^ Sounds good.

Quote:
Originally Posted by victorzamora View Post

... this isn't under load ... ... I don't know if there's a vdroop with significant load ....

With PC case side panel open and taking great care you can read +12V and +5V from any free Molex connector while comp is running and under load.
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post #8 of 12

Yeah, we don't need a fried Victor.

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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #9 of 12
What may result from careless probing with a MM inside a running PC is a fried comp.

Voltages outside PSU case (+12V max) can't harm Victor to the point of having to RMA him. biggrin.gif
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HAL-9011
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post #10 of 12
Quote:
Originally Posted by TELVM View Post

What may result from careless probing with a MM inside a running PC is a fried comp.

Voltages outside PSU case (+12V max) can't harm Victor to the point of having to RMA him. biggrin.gif

 

lol!

 

Ok, all kidding aside, I'd like to change my response to "we don't need a fried Victor's computer". hehe

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
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