Having a lot of problems with the southbridge on my mobo lately, its a fairly old rig in tech terms (had it for 4 years nearly). was always fine even OC'd but in the last 2 weeks I've not only had to drop everything back to stock but also had to keep the side of the chasis off, with desk fans that are ever increasing in size and power just to keep it from thermal cutout.
It's now at the point I cant even play a game like SC2 on steam for 5 minutes on lowest settings before it thermal cuts or just completely hangs, the culprit, after rigorous testing is the southbridge. Its one of those complete unit copper pipe/fin combo coolers on an Asus ROG board. No matter what I do now it wont even Idle below 60 and any load sees it rocket to 65-70+ in seconds.
I'm between a rock and a hard place right now, I really rely on my pc not only to socialise but for looking for work too (I work agency at present)
Cant afford to upgrade to newer kit but cant be without it.