Hi Rozel, I've just done a similar upgrade to my system, but just to let you know I did not have to re-install WIndows. This is important for P3D as this uses the Windows registry which will be cleared out be the re-install, so you'll have to re-install P3D as well as your hardware drivers.
I too had a i7 K5820 on an Asus MB, which I then updated to an new Intel CPU on a new Asus MB and this is the key point, both CPU and MB are so similar that the system will almost start without re-installing Windows. These were the notes I made at the time:-
After build tried to boot with original Windows install still in place, but PC would only boot to BIOS. Had to enable CSM and change to Windows UESI in Boot tab.
Now it attempted to start Windows, but seemed to stick on 'Adding Devices', so opened the CD draw and added the ASUS MB DVD, which seemed to free it. Then loaded correct MB drivers and rebooted. Started OK this time. Updated GE Force drivers (NB: I was upgrading from a GTX 980 to a RTX 2080 Ti).
System was using low settings for Crucial DRAM 3000MHz CAS 15-16-16-35, so Enabled X.M.L on BIOS EZ Mode screen, which worked.
I would then strongly advise that you run the following Microsoft utility "SFC /scannow" in a command window as Administrator (to open press Windows Key and X, then A) which will find and corrected any issues with Windows.
This saved me a lot of hassle and not to mention many hours reinstalling software, drivers, etc. NB: As X-Plane does not use the Windows registry it should unaffected by a re-install as you've been already advised.
Best of luck.