I have seen a A64 ADA3000 AEP4AX CBASC 0406UPMW in action It did 2600 pifast stable @ 1.67 v
http://server6.uploadit.org/files/St...iFast48sec.JPG
Tis @ Boxed cooling. But pifast woud only run 1 time. 2550 was no problem. The cpu could do more when he is gonna use beter cooling. Maybe a 3.0 @ Prom M II GT ?