http://www.xtremesystems.org/forums/showthread.php?266589-The-OverClockers-BSOD-code-list
BSOD codes for overclocking
0x101 = increase vcore
BSOD Codes for SandyBridge
0x101 = add more vcore
If it's a rare instance it may be a rare glitch or a minor power fluctuation and nothing to be bothered about. If it keeps happening, up the vcore a single step (0.05 or whatever granularity your BIOS allow). I suppose you're on the very border between stability and instability, as low vcore as possible for a stable O/C.
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