Z68A-D3H-B3 Voltage problems.

[Kiron]

Hello,

First of all, I'm not particularly tech-savvy, so please bear with me.

My computer has the above stated mainboard with an i5 2500k and 8GB of Corsair 1333 RAM running Windows 7. I have this computer since Nov 2011 (about 2.5 years) and never overclocked it in any way.

Today the machine froze 3 times shortly after booting up (about 20min after start, then 10min, then during booting windows). During the restarts it quickly restarted again; basically, the lights went on for 2 seconds, then off again, this repeated about 5 times before the machine started.

I checked the BIOS and received this message:
"The system has experienced boot failures because of overclocking or changes in voltage. Latest settings in BIOS may not coincide with current H/W states"

Since then, the computer seems to be running fine, however I'm still concerned. Again, I didn't change any settings, this problem occured on its own.

I installed CPU-Z and it says my DRAM-Frequency is 667.8 MHz. Isn't that half of what it's supposed to be?
CPU runs at 3400 MHz.


Here are the voltage numbers from the BIOS, are these all right?

Vcore 1.248v
DDR15v 1.536v
+12v 12.172v
Vcc3 3,324v
Vcc 4,980v
Vtt 1.064v


I'm concerned that either the power supply or the RAM is damaged in some way.


What do you make of this? Is there a way to find out whether power supply or RAM is damaged?
If you need more information, I'll be happy to provide it.


Thank you.

[autotech]

Under ram in cpuz see if is set at 2T if so then multiply the 667.8 times 2 to get your ram speed.

Load optimized defaults in bios and that should set it right. I have seen a motherboard battery going low voltage and causing weird things id check it while I was at it.

[Kiron]

Hello,

Yes, the RAM is set to 2T, so that's all right.

The computer restarted twice on its own during standard office operation today.
After I  loaded the optimized defaults I got a bluescreen (0x0000007B) 5 times before it booted up again; additionally my hard drive now seems to be running on IDE, at least the BIOS shows it under IDE, which it never did before.

How can I check the voltage level of the CMOS Battery? Speedfan doesn't show it and I don't have a Voltmeter.

Do you think it is a problem with this battery or could it also be, that there are too many devices taking power from the same wall socket? I have the computer, monitor, sound system, telephone, modem and router all plugged in there. It never was a problem before, but well.

If it is the battery, do I need a specific one for my mainboard-type or will any do?

Thank you.

[autotech]

doesn't sound like a battery to me at this point. As far as the wall socket it doesn't blow a fuse it isn't a problem.  I have all that and more on mine but I ran a dedicated wire to a 20 amp breaker just for this wall strip and all devices.


***STOP 0x0000007B (parameter1, parameter2, parameter3, parameter4)
INACCESSIBLE_BOOT_DEVICE

[ac]

Your DDR3 Ram is failing. Use memtest86 64 bit to test it. You can run a computer without a cmos battery installed, that's not the problem.