Solved APU 4350g with no fan in PC case?

Hello elphindor,

Easy one to answer is this, no and for various reasons, hot air will be trapped inside the case and cause overheating, dust will build up inside the case and this will make an already overheating system overheat even quicker.

The ideal cooling arrangement for most users is the pull/push method, one or two fans at the front to draw in cool clean air across the internal hardware and at least one large exhaust fan at the rear to expel the hot air asap, side and top fans while good to have cannot replace the pull/push system and are only seen as complimenting the more efficient cooling set up.

In addition to the above, good internal cable management helps with cooling and you should never have use a cheap PSU as they are renowned for causing overheating.

Being that the OP returned but chose not to reply this thread will be marked as answered and closed.