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Computer restarts randomly after installing new graphics card and power supply unit; sometimes won't post,monitor gets no sign

Tags:
  • Power Supplies
  • AsusTeK COMPUTER
  • Boot Failure
  • Corsair
  • Asus
  • Graphics Cards
Last response: in Systems
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September 24, 2014 7:30:25 AM

I had an system which i was using from December 2012,specs are as follow:

AMD PHENOM II X6 1090T 3.2 ghz(not black edition)
Asus M4A88T-M motherboard(on board 256 mb dedicated ati hd 4250 radeon gpu)
Zion Ram DDR3 1333MHZ 4GB
2TB seagate HDD
Iball entizer cabinet (with its stock psu)

Now few days back i installed a asus gtx 750ti 2gb ddr5(ph version) and a new corsair vs550 psu....it booted up normally untill i installed nvidia drivers on my hdd.......after that it started to get random reboots and i get a kernel-power error in event log each time it reboots,sometimes it won't even post properly.....memok light keeps blinking and all fans are running well but no display on monitor.......sometimes it reboots just after showing the boot screen sometimes on logon screen sometimes after running 1 hours sometimes run for 10-12 hours without any problem.......12v voltage is something odd,showing 11.729 on its rail......i don't know what to do?but whenever i get back to my old setup and login into safe mode all runs fine.......no crash nothing........so what to do??please help me.....

More about : computer restarts randomly installing graphics card power supply unit post monitor sign

September 24, 2014 7:39:18 AM

It may be the PSU causing the restarts. Is it mostly when you PC is under heavy load? Or is it random?
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September 24, 2014 7:42:33 AM

It is random......sometimes it does on boot screen.....sometimes on logon screen,sometimes run fine for 10-12 hours sometimes just after loggging in to desktop sometimes after 1 hour after logging in......
Thanks for so quick reply!! :) 
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September 24, 2014 7:47:23 AM

It can be a faulty HDD. Did you happen to knock the HDD when adding in the GPU or PSU? Although when it is the HDD, you tend to see a blue screen before restart.
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September 24, 2014 7:55:23 AM

No i checked the hdd in other computer it is stable and okay
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September 25, 2014 7:20:22 PM

Anyone can give any more solution,please?
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September 25, 2014 10:03:55 PM

Try swapping another of the same PSU. The PSU might be bad.
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September 27, 2014 9:01:11 PM

is this possible that the motherboard atx connector port is loose?cause when i am pressing it it does not restart but when i don't it again behaves in same way
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September 27, 2014 10:41:22 PM

Is that possible that graphics card is not compatiable with the power that my mobo delivers?and it damaged anything in mobo? :/  :/  i can't find any clue......please help.......(note: i changed the psu and tried to boot it with only one ram stick(actually 3 different ram sticks) but same thing is happening.......it is just restarting......
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