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PSU maybe going bad

post #1 of 6
Thread Starter 
Don't know where to post this so i'll try here. today i drove to the store and was gone 30 mins, when i got home my tower was off and the monitor, printer, modem, and router were on. i pushed the power button and nothing happened so i flipped the switch on my power supply off thne back and then pushed the power button on the case and it booted up fine. bios shows 12volt is at 12.025v 5volt is at 5.022 3.3volt is at 3.216v. I ran prime 95 for 12 passes while monitoring the system with HWiNFO64 and nothing got hot and all psu voltages were perfect, the only one that changed was the 5volt dropped to 4.095v which is still good.
my specs are listed below and nothing is overclocked. also i built this sytem 2 years ago and it has ran 100% perfect and the only change i made was 1year ago i replaced my psu with the Corsair AX1200 as it was a generic psu and i didnt trust it with 2 GTX 580's.
thanks for any suggestions. so far 12 people have looked at my post on corsairs forums but no one has replied to it. forgot to mention that my APC battery backup software showed that the last time it intervened was on 11/03/2012 for 5 seconds.
Edited by jlhawn - 11/12/12 at 8:39pm
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
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Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
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post #2 of 6
Two things: 1. 4.095v is way out of spec, 4.75v is minimum per ATX specification. 2. 1200w is enough to run your rig 2-3 times over. A 600w PSU would be more than sufficient.
post #3 of 6
Thread Starter 
thanks for the reply.
this morning I ran a stress test using a very good volt meter on a molex and the 5volt rail in question only dropped to 4.999v and then went right back up to 5.023 in a split second and stayed there. as i have been told before don't rely on software for readings of your computer. anyway I am going to wait and see what happens as it's been running fine now for over 12 hours. I am thinking it had something to do with my battery backup while I was away and an electrical problem in my house and maybe the battery backup didn't respond correctly and my computer just shut down. I used the psu guide on corsairs web-site and it showed a 850w psu was needed to power my system, I don't think a 600w would be good enough for 2 GTX 580's but I am not an expert I just built a few computers for fun.
Edited by jlhawn - 11/13/12 at 6:32am
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
  hide details  
Reply
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
  hide details  
Reply
post #4 of 6
Quote:
Originally Posted by jlhawn View Post

thanks for the reply.
this morning I ran a stress test using a very good volt meter on a molex and the 5volt rail in question only dropped to 4.999v and then went right back up to 5.023 in a split second and stayed there. as i have been told before don't rely on software for readings of your computer. anyway I am going to wait and see what happens as it's been running fine now for over 12 hours. I am thinking it had something to do with my battery backup while I was away and an electrical problem in my house and maybe the battery backup didn't respond correctly and my computer just shut down. I used the psu guide on corsairs web-site and it showed a 850w psu was needed to power my system, I don't think a 600w would be good enough for 2 GTX 580's but I am not an expert I just built a few computers for fun.

600W isn't good enough for 2 580's I could barely run 1 580 with a 600w PSU... My case fans and lights would dim when I would fold with my 580 with a 600w PSU.... Granted the whole system wasn't even getting close to 600w, the 12v line really was dipping below 11.5V, actually GPUz was showing 10.9V under full load. scary!

I'd say get a good 750w or greater PSU.
post #5 of 6
Quote:
Originally Posted by Cakewalk_S View Post

600W isn't good enough for 2 580's I could barely run 1 580 with a 600w PSU... My case fans and lights would dim when I would fold with my 580 with a 600w PSU.... Granted the whole system wasn't even getting close to 600w, the 12v line really was dipping below 11.5V, actually GPUz was showing 10.9V under full load. scary!
I'd say get a good 750w or greater PSU.
If your 12v rail was dropping to 10.9v under load, you just had a garbage PSU. Out of the box, the most a GTX 580 will draw is ~225 watts peak. TDP on the i7 970 is 130w. That totals to 580 watts. I guess my initial estimate was a bit conservative, but a 650w PSU would still be fine.The entire discussion is moot anyway, since the OP has a 1200w PSU.
post #6 of 6
Thread Starter 
Quote:
Originally Posted by Cakewalk_S View Post

600W isn't good enough for 2 580's I could barely run 1 580 with a 600w PSU... My case fans and lights would dim when I would fold with my 580 with a 600w PSU.... Granted the whole system wasn't even getting close to 600w, the 12v line really was dipping below 11.5V, actually GPUz was showing 10.9V under full load. scary!
I'd say get a good 750w or greater PSU.

I didn't think a 600w would run my system, anyway the Corsair AX1200 thats in it now I will just keep an eye on it as the system only shut off once and I wasn't home to see why so I am thinking it had something to do with my APC XS1500 battery backup as it's max output to my psu is 825watts so maybe something weird happened to my electric in my house and the backup couldn't answer the call.
I only use a backup to protect my memory as years ago I had a brown out and it damaged all my memory but that also was a old server.
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
  hide details  
Reply
Old X58
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 970 6 core ASUS Sabertooth X58 MSI GTX 1070 Gaming X GSkill 24 gigs 
Hard DriveHard DriveHard DriveCooling
Crucial MX100 256 gig Crucial M500 120gig WD VelociRaptor 1TB Noctua 
OSMonitorMonitorKeyboard
Windows 7 Pro 64bit LG 29inch widescreen DP LG 29inch widescreen DP Corsair K65 
PowerCaseMouseAudio
EVGA SuperNova G2 1000w Corsair C70 Corsair M65 Sound Blaster Z 
Other
Custom sleeved psu cables 
  hide details  
Reply
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