Well sonetimes i feel like 3.8 GHz is too weak what i should do then?
If 5.2 is too high... and 3.8 is too weak... 4.5 should be a magic number
That aside, it sounds like you tried the "youtube" method of overclocking, maxing the juice and seeing how far that will take you. If youre gonna do it, do it properly. Start by finding your P state at stock voltage (aka, reset everything, and see how your clock speed gets without adding any voltage. Not looking for super stability, just the point where you need to even consider adding voltage).
So from there, follow any of our lovely guides here. For gaming uses, 2 hours on p95 feels to be more than plenty.
For the FX chips, 1.4v is a good 24/7 number, but 1.45 if you need to squeeze out just a little extra. Anything over 1.5 for more than short sprints is really asking for trouble. You're not speaking to "ah maybe they know". You're speaking to people here that have destroyed motherboards and cpu's. Turn your voltage way down and start over.
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I'm concerned over the motherboard my self. I doubt it will let you pass P95. I wouldn't be surprised if it's throttling you TBH. If 3.8 is too weak maybe aim for something in the 4.5 range. If that motherboard goes it can kill other parts of the system. Namely the CPU
tdp on the 4300's is, admittedly, far lower than the 8300's. Im willing to bet if he had an 8 or even 6 core in there, something would be toast though...