Question Help Just upgraded from Ryzen 1600 to 3700X and I'm stuck in a boot loop

[FaLcON77]

PC specs:

• CPU: AMD Ryzen 7 3700X
• MB: Asus Prime B350-Plus
• GPU: ZOTAC GeForce® GTX 1060 6GB AMP! Edition
• RAM: Kingston HyperX Fury 2x8GB DDR4 (2400MHz at stock)
• SSD: Samsung 850 evo 250GB
• PSU: 550W EVGA SuperNOVA G3 80+

As the title says, my PC keeps restarting, long before Windows lockscreen pops up. I can get into BIOS, and when I undervolt the CPU at some minimal offset and ratio less than 36 (34 is the highest I tried, didn't bother since it won't even run 36) I can get into the Windows. I've tried clearing CMOS, flashing different BIOS version, updating chipset drivers, I even reinstalled the Windows, but nothing helped. Tried with only 1 stick of ram, same results. Also, mouse cursor is laggy in bios compared to when 1600 was installed.
At this point I have no clue what is the problem and I need some help.

 

[Lutfij]

Welcome to the forums, newcomer!

By flashing the motherboard BIOS to different versions, which version are you currently on? You should ideally be on the latest prior to dropping in the 3700X. According to their support page, so long as you have BIOS version 4801, you're good to go.

How old is that PSU?

 

[FaLcON77]

Currently I'm again on the latest version of BIOS, 5602. PSU is almost 3 years old. I also tried setting FCLK to half of the RAM speed, but nothing changed.

 

[FaLcON77]

I also tried another stick of ram. G.Skill F4-3000C16-8GISB, same thing happened. I didn't mention it, my ram is HX424C15FB2/8.