P55-GD55 random restart

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Tiger90

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Just finished my latest build. This one using the P55-GD55. System posted immediately but I am getting random hard reboots. There is no bluescreen, just restarts to the colorful boot screen.

System:
P55-GD55  (Running latest BIOS - 1.6)
Intel Core i5 750 - NO Overclocking
Antec 300 Case
Antec TP500 Power Supply
Mushkin Memory 1.5v 9-9-9-24 1333mhz
Western Digital 320gb SATA Drive  (boot drive)
Samsung 1tb SATA Drive  (data drive)
ASUS 22x DVD-RW
Windows 7 Professional  x64
EVGA GE FORCE 210 (fanless video card) PCI-E 2.0 x16  (Using latest driver)

I have tried new Kingston RAM with the exact same specs as my Mushkin. I have also tried a different nVidia PCI-E 2.0 x16 graphics card. Same issue occurs...

The hard reboots occur frequently. Sometimes when I am just browsing settings in the BIOS and othertimes I am able to get all the way into Windows and installing apps.  I was obviously able to get the OS installed but I have never been able to make it all the way through Office 2010 install.

The only other thing I can think to try before RMA'ing the Motherboard and CPU (combo from Newegg) is to try a differerent power supply. I seriously doubt the brand new Antec TP-500 is the problem. (but it is worth a try)

Any suggestions before I start the RMA process?
 
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Update BIOS, there have been several memory comptatibility BIOS updates for the P55 MB's. Don't think for for a minute that it can't be the Antec PSU, there have been plenty with Antec in that power range that had to replace with a better PSU. Corsair VX450/VX550W would have been a much better choice for PSU.

When I 1st got my H55-GD65 I had constant re-starts like that and after flash to the 1st BIOS update that came out it fixed my problem.
 
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Thanks for the suggestions. Updated to BIOS 1.6 yesterday with no change in behavior.

I am going to grab a new power supply from a local shop to test tomorrow. If it is an issue with the power supply it has to be a defective unit. I have stripped the configuration down to 1 DVD RW, CPU, MB, 1 320gb drive and a low-end video card. The Antec TP550 shoiuld handle this easily considering I have not even seriously exercised the CPU or Video Card. The behavior is the same. Will post new PS results tomorrow.
 
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Good thing I tried a new PS before RMA'ing the board and CPU. The problem was a defective Antec Power Supply.
I borrowed a basic 430W supply from the local computer shop and all problems are gone. Ran hours of stress tests
and no signs of instability.

Thanks for the advice...
 
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Get the Corsair VX550.  For the biggest bang for the buck and for even greater future proofing, get the Corsair TX650.
 
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Current price of TX650 with rebate is less than VX550:  http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005

A bit off but newegg has the new Corsair AX1200 modular single rail +12V~100A
 
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