Go Back   Hardware Canucks > HARDWARE > Power Supplies

    
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old October 21, 2008, 12:33 PM
Oversized Rooster's Avatar
Allstar
 
Join Date: Mar 2008
Location: Toronto, ON
Posts: 609

My System Specs

Exclamation Weird PSU Voltages...is this OK?

I have noticed lately that my PSU is putting out weird voltage at -5V, +5V and +12V.

It's a PC Power & Cooling Silencer 750W PSU. I bought it new about a year ago and it's been running fine.

Here is what the PSU is running:

Intel Core 2 Quad Q9450 @ 3.8GHz 1.33V
Asus P5Q-E Mobo @ 1900FSB
2 x 2GB OCZ Reaper HPC DDR2-1066 @ 1144 2.18V
1 x WD 300GB VelociRaptor HD
3 x WD 500GB Caviar SE16 HD
2 x 512MB Sapphire Radeon HD 4850 Cards @ 700/2100
Auzentech Prelude X-Fi PCI Sound Card
20X LG DVD-RW
Floppy Drive
5 x 120mm case fans
1 x 200m case fan
4 x USB power-drawing devices

What worries me most is how the -5V is at -0.17V. And also by how much the +5V and +12V are off. The +5V is at 5.56V and the +12V at 12.46V.

Also, is the -5V supposed to be -0.17V? I think there is something horribly wrong here. Isn't the -5V supposed to be -5V?! I mean that's what it's called, ain't it? :lol:

So given my 11.2% +5V overvolt, 3.8% +12V overvolt and 96.6% -5V undervolt, should I RMA? Should I get a new PSU?

The picture below is when the PC is idling. When it's at load, the CPU Core voltage goes to 1.33V, but the weird -5V, +5V and +12V are still the same.

__________________
Main: Intel 2600K @ 4.8GHz | Gigabyte P67A-UD7-B3 | 16GB Corsair DDR3-2000 | 2 x 240GB Corsair Force 3 in RAID1 | 2 x 4TB Hitachi 7K4000 | 3 x 2TB WD Caviar Black | Antec 1200 | Seasonic XP-860 Platinum | 2GB GTX 670 | 2 x 27" Asus VE278Q | Asus Essence ST | Win7 Pro 64-bit
Reply With Quote
  #2 (permalink)  
Old October 21, 2008, 12:45 PM
burebista's Avatar
Allstar
 
Join Date: Sep 2007
Location: Romania
Posts: 598

My System Specs

Default

Relax man. Ignore software readings and measure with a DMM if you want to be sure. But with a PC P&C (Seasonic OEM) I'll never be worried. :D
Reply With Quote
  #3 (permalink)  
Old October 21, 2008, 01:06 PM
Oversized Rooster's Avatar
Allstar
 
Join Date: Mar 2008
Location: Toronto, ON
Posts: 609

My System Specs

Default

Quote:
Originally Posted by burebista View Post
Relax man. Ignore software readings and measure with a DMM if you want to be sure. But with a PC P&C (Seasonic OEM) I'll never be worried. :D
I don't have a DMM, nor do I know where to measure. Why is the -5V not actually -5V? Isn't that strange?

Aside from this I have never experienced any issues with the PSU or any component...it's all running solid.
__________________
Main: Intel 2600K @ 4.8GHz | Gigabyte P67A-UD7-B3 | 16GB Corsair DDR3-2000 | 2 x 240GB Corsair Force 3 in RAID1 | 2 x 4TB Hitachi 7K4000 | 3 x 2TB WD Caviar Black | Antec 1200 | Seasonic XP-860 Platinum | 2GB GTX 670 | 2 x 27" Asus VE278Q | Asus Essence ST | Win7 Pro 64-bit
Reply With Quote
  #4 (permalink)  
Old October 21, 2008, 01:16 PM
DK2 DK2 is offline
Allstar
F@H
 
Join Date: Apr 2008
Location: GTA
Posts: 821
Default

Everest is likely just confused, since you don't have a DMM, try verifing
with other software info programs, like SiSoftware Sandra;
SiSoftware Zone

edit: or in BIOS if ya got'm

Last edited by DK2; October 21, 2008 at 01:54 PM.
Reply With Quote
  #5 (permalink)  
Old October 21, 2008, 01:55 PM
Oversized Rooster's Avatar
Allstar
 
Join Date: Mar 2008
Location: Toronto, ON
Posts: 609

My System Specs

Default

Quote:
Originally Posted by DK2 View Post
Everest is likely just confused, since you don't have a DMM, try verifing
with other software info programs, like SiSoftware Sandra;
SiSoftware Zone

edit: or in BIOS if ya got'm
Sandra does not show -5V. However the other readings are simply different. Now they all seem to be undervolted!

__________________
Main: Intel 2600K @ 4.8GHz | Gigabyte P67A-UD7-B3 | 16GB Corsair DDR3-2000 | 2 x 240GB Corsair Force 3 in RAID1 | 2 x 4TB Hitachi 7K4000 | 3 x 2TB WD Caviar Black | Antec 1200 | Seasonic XP-860 Platinum | 2GB GTX 670 | 2 x 27" Asus VE278Q | Asus Essence ST | Win7 Pro 64-bit
Reply With Quote
  #6 (permalink)  
Old October 21, 2008, 02:08 PM
sswilson's Avatar
Moderator
F@H
 
Join Date: Dec 2006
Location: Moncton NB
Posts: 14,490

My System Specs

Default

Software voltage reporting is all over the board from one platform to the next (Only thing I use them for is to see what kind of drop I get from idle to load, and even that is questionable). I wouldn't be too concerned about what readings you're seeing in software, especially the -5V line... I don't think I've ever seen that reported properly.
__________________
MSI Z87I Gaming AC / i5 4670K / 2X 4G Gskill 1866 DDR3 / XFX XTR 750 / EVGA GTX 680 SC+ 2GB / Intel DC S3700 200G / random 160G Sata HDD
Inwin 904 / Swiftech MCP655-b / Alphacool NexXxos XT45 120 Rad / 2X Scythe GT AP-15 / EK Supreme HF / Dell UltraSharp U2412M

Asrock AM1H-ITX / AM1 Athlon 5350 / 2X4G Gskill PC3-14900 / Intel 6235 Wi-Fi / 90W Targus Power Brick / 320G Seagate Momentus / Mini-Box M350 / 1X 22" Dell IPS / 1X 22" HP
Reply With Quote
  #7 (permalink)  
Old October 21, 2008, 04:18 PM
Hall Of Fame
 
Join Date: Jul 2008
Location: Canada
Posts: 1,221

My System Specs

Default

Just ignore the completly the negative voltage, they are unused now anyways what you should concern with is the +3.3V, +5V and +12V, that's all. Stay within a +/- 5% tolerance. You cannot rely 100% on software readings. Take the readings directly from the power connectors, using a DVM - You will usually get a higher than 5V and 12V reading when done straight from the connector because the PSU is sending out higher to compensate for contact resistance - When measuring a PSU using a DVM take a reading when idle, and a reading when full load, that's a good way to test your PSU.
Reply With Quote
  #8 (permalink)  
Old October 21, 2008, 04:25 PM
enaberif's Avatar
Hall Of Fame
 
Join Date: Dec 2006
Location: Calgahree, AB
Posts: 10,598
Default

You won't see the -5v line used at all don't worry.
Reply With Quote
Reply


Thread Tools
Display Modes