PSU - Low Voltage? (HWMonitor Readings)

Enclosures, modding, blowholes, and the power needed to run it all.

Moderators: Nemesis, SpotTheCat

PSU - Low Voltage? (HWMonitor Readings)

Postposted on Mon May 05, 2014 5:40 am

Image

Ummm, seems low to me :P. 12v running around 8, and all other rails seems to be about 30-40% lower than they are supposed to be. A few questions regarding this, how reliable are these readings from the hardware and if it is correct, obviously its something to be concerned about? Note that this was taken after Prime95 has been running for roughly 20+ minutes.

Reason for my asking is that this particular machine has been "randomly" restarting on a client. At one point they claimed it was restarting only after they typed in their password to login. I however haven't been able re-create the issue. I'm actually typing this post from the offending machine in an attempt to use it. Prime95 is running in the background at the same time and has been doing so for over 20 minutes. I replaced a single 140mm fan on the top that was partially seized up and would turn very slowly. It was only plugged into the system via a molex connector and not a PWM connector. The new one is now plugged in with a 3 prong to the 4/3 PWM connector on the motherboard (sys_fan). I've never had a system restart because a case fan was dead, only a CPU that is not working or unplugged. The CPU Heatsink Fan is a Thermaltake TR2 R1 and appears to working flawlessly.

Thoughts?
"I think there is a world market for maybe five computers."
Thomas Watson, chairman of IBM, 1943

i5-2500K|Asus P67 Sabertooth|16GB Corsair 1600|MSI 7850 2GB|250gb Evo 840|Corsair 400R|ET750w PSU|Logitech G5|Dell 2420L|Corsair Vengeance 1300
Welch
Minister of Gerbil Affairs
Gold subscriber
 
 
Posts: 2649
Joined: Thu Nov 04, 2004 5:45 pm
Location: Fairbanks, Alaska

Re: PSU - Low Voltage? (HWMonitor Readings)

Postposted on Mon May 05, 2014 5:52 am

If the voltages were that low, it shouldn't run. I expect that if you check one of the drive cables with a hand-held multi-meter, you'll find the +12 V to be in the range of 10.8 to 13.2 V (the +/- 10% that even low-quality PSUs must meet).
i7-4770K, H70, Gryphon Z87, 16 GiB, R9-290, SSD, 2 HD, Blu-ray, SB ZX, TJ08-E, SS-660XP², 3007WFP+2001FP, RK-9000BR, MX518
JustAnEngineer
Gerbil God
Gold subscriber
 
 
Posts: 15489
Joined: Sat Jan 26, 2002 7:00 pm
Location: The Heart of Dixie

Re: PSU - Low Voltage? (HWMonitor Readings)

Postposted on Mon May 05, 2014 6:01 am

Yeah, it is rather unlikely that the system would even POST if the voltages were really that far off. It appears that HWMonitor does not know how to properly read the sensors on this board. The weird readings and the restarts are probably unrelated.
(this space intentionally left blank)
just brew it!
Administrator
Gold subscriber
 
 
Posts: 37859
Joined: Tue Aug 20, 2002 10:51 pm
Location: Somewhere, having a beer

Re: PSU - Low Voltage? (HWMonitor Readings)

Postposted on Mon May 05, 2014 6:10 am

Figured as much, thanks for re-assuring me guys.

I've got my hand dandy Klein MM2000 Multi-meter that I got for Christmas a few years back (and posted on TR), guess its time for it to get some more use :P
"I think there is a world market for maybe five computers."
Thomas Watson, chairman of IBM, 1943

i5-2500K|Asus P67 Sabertooth|16GB Corsair 1600|MSI 7850 2GB|250gb Evo 840|Corsair 400R|ET750w PSU|Logitech G5|Dell 2420L|Corsair Vengeance 1300
Welch
Minister of Gerbil Affairs
Gold subscriber
 
 
Posts: 2649
Joined: Thu Nov 04, 2004 5:45 pm
Location: Fairbanks, Alaska

Re: PSU - Low Voltage? (HWMonitor Readings)

Postposted on Thu May 08, 2014 9:00 am

I have an ASUS P8Z77-V LK Ivy Bridge setup and the voltages are equally wacky. ASUS's software from their website does report them to match what I see in the EFI interface, though. Must be an HWMonitor issue.
I do not understand what I do. For what I want to do, I do not do. But what I hate, I do.
derFunkenstein
Gerbil God
Gold subscriber
 
 
Posts: 21408
Joined: Fri Feb 21, 2003 9:13 pm
Location: WHAT?


Return to Cases and Power Supplies

Who is online

Users browsing this forum: No registered users and 1 guest