FX 6300 problems

I can overclock my Chip to 4.4 but when I run Prime 95 after like 10-15 minutes on Prime95 it starts giving illegal sumout and roudning errors, I bumped up the voltages to the point I could while still keeping temperatures below 60C while it is running properly but as soon as the errors starts the temps shoot up fast to like 66 and 67 so I set the computer to shut off past 63. I am stable 4.2 right now after 90 minutes Prime95 staying under 50. I am using stock fan btw can't squeeze aftermarket cooling into budget for now. Any ideas on if I should stick with the 4.4 because it is stable for most things except stress tests.