Seem to high vcore ... Try as posible at stock volt but don't change auto (sellect it by manual ). If you increase fsb your ram need setting too. Vdim and cas latency, keep htlink at 2000 as posible too. Cool n quite / C1E disabled. Use good after market cooler ( I know stock clock can hang it) just for healty and keep cool temp.
You can check him cpu-z : www.tomshardware.com/forum/254890-29-overclocking-athlon-regor