Had mine up to 5626Mhz (29 x 194) @1.68v and ran a 2.82 wprime32, but couldn't get a pic in time before it BSOD :( Rom was my witness though )
I'd die around -131C and come back to life at -126C so I'm thinking it's the board not the chip. If I have time before I leave for Denver I'll try swapping boards and see what happens.