Question CPU Over Voltage Error!

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Zorharo

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Jul 23, 2017
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510
Hey, i recently installed a new cooling tower to my rig, after it it's had a series of minor issues, one first with displaying, which Magically fixed itself by unplugging and plugging back again the RAM. But now it's stuck on the CPU over voltage error. From the BIOS it says its constant at 4.064V The core temp is at 25-35°C

Any help would be gladly appriciated:/

Specs:
Mobo: ASUS Z170 Pro Gaming
CPU: Intel i7-6700K
RAM: Kingston16GB RAM (2 x 8GB) DDR4-2133
BIOS Version 3805
 
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Z

Zephyl

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Mar 13, 2017
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Unplug all power cables from motherboard, make sure the headers are clear of obstructions on both the cable and motherboard, replug. If the issue persists, you can turn off ASUS anti-surge in the UEFI. Before you do that, though, what brand and model of PSU are you using?
 
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Zorharo

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Jul 23, 2017
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510
Thanks for the quick reply!

COrsair CX750M
Model 75-002019
Part NO CP-9020061/75-002019

ASUS Anti-Surge was already previously disabled, i don't know if that might've been a factor?
 
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Z

Zakk90

Commendable
Jan 15, 2017
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Hmmm.. Try clearing the CMOS. It's the battery on your motherboard. Pop it out and wait 5 minutes then put it back in and let me know if you can change the settings.
 
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Zorharo

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Jul 23, 2017
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Hey again,
Did as you said, cleared the CMOS by poping the bat out for 5 mins.
Changed CPU Core/Cache Voltage to Manual and set it to 1.300.

The PC boots with the same warning and a Core Voltage at 4.064V. It's like its refusing the ovverride
 
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Z

Zakk90

Commendable
Jan 15, 2017
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1,510
What is your power supply? It might be a power supply problem. If you have an extra I would test it. I'm trying to think here lol. I mean if you know all your connections are good and your mobo is clean 100% I would try to flash back to the previous bios version and see if that fixes it. I'm not trying to be condescending by asking this but you did apply new thermal paste right? Some people just forget.
 
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Zorharo

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Jul 23, 2017
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Update:
Turned off Turbo mode
Manual Voltage set to 1.300V

It seems to be stuck on the ASUS Logo with "Please press DEL or F2 to enter UEFI BIOS Setting" as the status msg.

The "Boot Device LED" lap on the Mobo is bright red.
 
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Z

Zakk90

Commendable
Jan 15, 2017
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1,510
So it freezes at that point? You can't enter the bios? Did you apply new thermal paste? Make sure your memory is in A2 and B2 slots. Flash the bios if you can. If you have a laptop put it on a flash drive. I seen where another person had a similar problem and flashing the bios and taking the CMOS battery out for awhile fixed it.
 
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Zakk90

Commendable
Jan 15, 2017
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Also if you get it working i'd set the voltage to like 1.1 and see if its stable then go from there. My 7700k is at 4.5ghz and 1.125 voltage stable.
 
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Zorharo

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Jul 23, 2017
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FYI I'm heading off to bed for tonight seeing as it's pretty late, thank you both for the help so far, looking forward to having fresh eyes on it tomorrow, Cheers!

/Zorharo
 
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Z

Zakk90

Commendable
Jan 15, 2017
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Ok, well I was thinking about it and I have one more thing in mind. If you have your cpu over voltage jumper on try changing it to off by putting it on pins 2&1 which would be the middle and bottom pins. Also change your RAM from DIMM slots B1&B2 to A2&B2.
 
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Zorharo

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Jul 23, 2017
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InvalidError said:
If the BIOS keeps misreading CPU voltage at something like 4V which the CPU clearly wouldn't survive, the most likely explanation is a failure of the system monitoring chip or its voltage sensing connection to the Vcore rail.
Click to expand...

By this do you mean that the Mobo or the CPU is the root of the problem?
 
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Zorharo

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Jul 23, 2017
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InvalidError said:
The circuitry is on the motherboard but the motherboard may be using a power pin for feedback, in which case bad contact in the socket (from removing the previous HSF and putting the new one in) may also be a possibility.
Click to expand...

So check the Mobos CPU socket and around the CPU for possible thermalpaste or impurities that might attract electricity?
I'm sorry for being a nut head but I'm really no tech guy when it comes to this stuff:/
 
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Zorharo

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Jul 23, 2017
13
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510
Zakk90 said:
Ok, well I was thinking about it and I have one more thing in mind. If you have your cpu over voltage jumper on try changing it to off by putting it on pins 2&1 which would be the middle and bottom pins. Also change your RAM from DIMM slots B1&B2 to A2&B2.
Click to expand...

If I change the RAM to B2 & A2 it won't boot into BIOS even, what happens in this case is that the CPU LED goes red for ~7 seconds then goes blank, followed by the DRAM LED doing the same before it just goes in this loop.
 
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Z

Zakk90

Commendable
Jan 15, 2017
15
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1,510
I guess it's the correct slots for your mobo then. Most are either A1/B1 or A2/B2. Actually I had an MSI mobo that actually required the slots you're using but I thought it was just an MSI thing. I'd personally just need a new mobo at this point.
 
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