Overclock.net › Forums › Components › Power Supplies › HX850 3.3v rail fluctuation causing lockups, help!
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HX850 3.3v rail fluctuation causing lockups, help!

post #1 of 3
Thread Starter 
Hi guys,
My HX 850 is really letting the bottom fall out of the 3.3v rail, to the tune of 2.960v-3.088v at folding load and idle respectively. Any ideas on what might be causing it? I've never had issues with this PSU in the past. 12v and 5v are rock solid. 12.12v and 5.04v. When I first got this board I had similar issues and I plugging in the supplemental power on the board (extra 4 pin molex) and that worked, but this just popped up again. I checked the connections, everything seems ok. Any thoughts would be appreciated! PSU is now 2.5 years old and never opened or modded.
AC Mk-800 Cobra
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AC Mk-800 Cobra
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k ASUS P8P67 WS Revolution Zotac GTX 570 Corsair Vengeance 2x4GB 1600MHz 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD WD Red WD AV-GP Samsung CD/DVD Combo 
OSMonitorMonitorKeyboard
Win-7 Pro x64 HP LP3065 30" 2560x1600 Dell 1600x1200 Portrait Monoprice Gaming Keyboard w/ MX Blacks 
PowerCaseMouseAudio
Corsair HX850 Modified Corsair Obsidian 800D Logitech G700 X-Fi Titanium PCIe 
Other
Happauge 2250 Tuner Card 
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Reply
post #2 of 3
What are you using to measure voltage? If it's software then the reading is probably false.
post #3 of 3
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post

What are you using to measure voltage? If it's software then the reading is probably false.

It's the BIOS that I'm using, I don't have easy access to a DMM. I'm not sure what else would be causing these issues, and it's definitely related to voltage somehow- removing a GPU and adding the supplemental connector both helped the problem, but it's still not perfect.
AC Mk-800 Cobra
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k ASUS P8P67 WS Revolution Zotac GTX 570 Corsair Vengeance 2x4GB 1600MHz 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD WD Red WD AV-GP Samsung CD/DVD Combo 
OSMonitorMonitorKeyboard
Win-7 Pro x64 HP LP3065 30" 2560x1600 Dell 1600x1200 Portrait Monoprice Gaming Keyboard w/ MX Blacks 
PowerCaseMouseAudio
Corsair HX850 Modified Corsair Obsidian 800D Logitech G700 X-Fi Titanium PCIe 
Other
Happauge 2250 Tuner Card 
  hide details  
Reply
AC Mk-800 Cobra
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k ASUS P8P67 WS Revolution Zotac GTX 570 Corsair Vengeance 2x4GB 1600MHz 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD WD Red WD AV-GP Samsung CD/DVD Combo 
OSMonitorMonitorKeyboard
Win-7 Pro x64 HP LP3065 30" 2560x1600 Dell 1600x1200 Portrait Monoprice Gaming Keyboard w/ MX Blacks 
PowerCaseMouseAudio
Corsair HX850 Modified Corsair Obsidian 800D Logitech G700 X-Fi Titanium PCIe 
Other
Happauge 2250 Tuner Card 
  hide details  
Reply
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Overclock.net › Forums › Components › Power Supplies › HX850 3.3v rail fluctuation causing lockups, help!