My pc keeps freezing but no bsod or error code?

many reasons.

When you rebuilt your system, did you happen to reformat Windows? I know this isn't a popular suggestion but driver issues caused by old drivers will decrease performance and sometimes make the system unstable. On other forums, doing a fresh install of Windows is standard advice. I can tell you didn't when you said CPU drivers, which don't exist. There are chipset drivers, but there are also other drivers like LAN, sound, and SATA.

-Bad RAM. You would have to test 1 stick at a time. Have you tried any stress tests?

-BIOS on motherboard may need to be updated.

Out of personal experience with building PC's and testing hardware, most of the time failures like this are due to a faulty motherboard. I would suggest returning the motherboard, and then paying a tiny bit more for a b450 chipset motherboard.

anyone have any answers because I'm desperate at this point

I too have an AMD processor and experiencing frozen screens, unresponsive mice, or complete video blackouts sporadically without warning. I haven't seen these problems before with Intel. I'm using exactly the same OS and software versions, just a change in CPU. I'm thinking of going back to an Intel machine first chance I get.

Have you checked to see that all Windows updates are up to date? There is no rhyme nor reason as to when or why they update, and these updates can really mess with your performance when they happen.

That could really be a thousand things the most common issue would be a bad memory module or even an incompatible piece of Hardware like an add in card such as lan Etc.. so really it's a process of elimination if you have nothing important on your PC and it's not really set up it's sometimes easier just to reload Windows and drivers and start from scratch and see if that fixes it .. also if this a PC that you have pieced together you need to make sure you have all the timings and voltages etc right in the setup ..