I just recieved a 2.66 P4 from Newegg.com retail boxed with the product code BX8053PE2667DSL6EH and I checked Intel and it is in fact a C1 stepping! Hurrah! Intel Linky Has anyone else found many C1 steppings at this core speed? I mostly hear about people with 1.6a and 1.8as with C1 but never at this speed. Any predicted speeds I can get this baby up to? I'll be using a Swiftech MCX-4000 w/ a Thermaltake Smart Fan 2 for my cooling..Probably won't want to change core voltage but might for testing purposes. ;P Thanks for any input..can't wait to build this baby..unfortunately I'm leaving for Michigan tommorow ;\. Happy New Years!