So I noticed while using AIDA16 that the CPUID CPU Name "AMD Athlon(tm) 64 X2 Dual Core Processor 4200+" must be a hardcoded ASCII string stored in the processor itself - which, according to Wikipedia's article on the CPUID instruction, is true. If so, then if you know you have a Phenom II X2, and it returns something slightly different, or off, like Phenom II B45 when you overclock/unlock it, that probably means that the registers EAX, EBX, ECX and EDX are systematically corrupted, and therefore, that the CPU is unstable... makes sense?
On the other hand, it doesn't really make sense since it seems people have unlocked CPUs, the string changes, but it's still 24/7 stable.
Mothership: Thuban 1055T@3.7GHz, 12GB DDR3, M5A99X EVO, GTX470+Icy Vision Rev.2@840/3800, Vertex 2E 60GB
Supply ship: Sargas@2.8GHz, 12GB DDR3, M4A88TD-V EVO/USB3
Corsair: Macbook Air Ivy Bridge