9900K oc question and WHEA LOGGER Internal parity error or cache hierarch error.

Hi my pc:
9900K OC sync all cores was 50 now i have 47
2x16GB DDR4 GSKILL 3000MHZ
Corsair 850RmX
Asus Prime Z390-A

Few questions.
On 5ghz with voltage 1.320v i had very rarely Whea Logger 19 Internal Parity error during game in Metro Exodus.
So rarely like 1 pop up Whea in 1 month.
Also on Realbench on 1.320v i had Whea Logger 19 Cache Hierarchy Error.
So i bumped to 1.330v and 2 months was fine. But yesterday in Battlefield 5 Whea Logger 19 Internal Parity error pop up in Battlefield 5 on 1.330V.

And my question. Is Whea Logger 19 Internal Parity Error related to insufficent Vcore ? Cache hierarchy the same?

Last question.
Now i have cpu in 4700mhz. But this is underclock right? Because all cores running on 4700mhz. On stock cores running on 4700mhz but 2 cores on 5000mhz.

Please share opinions.

Possibly yes to the first Q and No to the second, the all core is x46 stock.

Buy a Ryzen...OC it and not worry about stupid heat or large power draw...it's simple and you might have enough for a GFX card that has more than 8gb ram.

In my experience, the WHEA error's come from extreme temps or not enough voltage, either way, it's almost certainly from your OC.

Can you give it a touch more voltage and see if it becomes stable?

I assume the system is stable at stock clocks, right?

Also, are you running an XMP profile for your RAM @ 3000MHz? Memory off the QVL list for your mobo?