New build overvoltage

WinterSolstice · May 29, 2020

Hey there. My roommate recently rebuilt his PC with a new motherboard, CPU and PSU. It's now running a Ryzen 7 3700X, Asus Strix B450f Gaming motherboard and the PSU is a Thermaltake Toughpower Grand 650W 80+ Gold. Upon finishing the build, we immediately run into a CPU overvoltage error and run the setup. We've tried resetting the CMOS, unplugging the main power and discharging, checked the board for any imperfections, updating to the latest BIOS, giving a negative offset in the voltage and we still see anywhere between 2.4-2.77 at the core voltage. Any ideas as to what might be the issue? There are some other concerning numbers down at the bottom as well. Pic provided

Jurrunio · May 29, 2020

At that kind of voltage the system wobt even boot, it will be dead in a push of a button. The board's just bad.

Or if you have the tools, measure the voltage from the OSU after the system is turned on.

WinterSolstice · May 29, 2020

I unfortunately don't have tools but I figured it had something to do with the board or PSU. This is my first time working with the new Ryzen chips and everywhere I look is showing 1.5v as high territory so 2.? is certainly not right.

Beerzerker · May 29, 2020

MB sensors are WAY off.

You could try to update the BIOS and see if anything changes but chances are you have a board Chock-Full-'O whacky sensors.
At those voltage values you'd see something like the Bikini Atoll nuclear tests take place at the push of a button, complete with a mini-mushroom cloud.

I'd go ahead and plan for an RMA to be done.

3|iTe--_--Mr_Te3 · May 29, 2020

Theres something really really wrong with the mobo or psu or both. you 12v is doing 16v your 5v is doing nearly 7v and your 3.3v is doing 5.5v. i think most likely itll be the mobo but id check your psu with a multi meter just to be safe. I hope you havent already fried anything

LIGISTX · May 29, 2020

Definitely try and update the BIOS. If that doesn't help, yup, has to be a bad MOBO. As others said, if those were actually the volts going to things, it would have let the magical smoke out already.

Or... make sure somehow the power supply plugs didn't get plugged into the wrong places, assuming the PSU is modular? They should be keyed to not end up plugged into the wrong things.... but just check. Also, if the old PSU was modular and the new PSU is modular but you reused the old cables..... they may have keyed in and NOT been correct. So check that as well.