I haven't heard, that there is any dead C0 stepping cpu's. (High Vdram)
If there is, please tell us how it happened.

And Sascha.. 2.05V was used 15+ hours in my last weekend bench session. No problems.. nothing. 1.45V VQPI is for 24/7 and memory voltage between 1.8-1.95V.. no signs of problems so far.