E8400 Q740A555T* Note the "T"* So far, nobody has been able to find out what the deal is with the "T" All I can determine is that some XS members from Canada and Australia have this letter at the end of their FPO/Batch#. Any more info would be appreciated
Pack Date: 12/20/07 VID:1.1125
Running 24/7@4005 445x9 Vcore:1.344v Gigabyte P35-DS3R
I got the exact same batch as you, retro...And running at the exact same FSB and vCore: 445FSB @ 1.344v (1.365v in bios). I have had mine up to 4600MHz @ 1.545v, but only SuperPi stable.

I'm curious about the "T" designation in the batch code, also. What does it mean, and why do some cpu's have it, while most do not? I have seen two posters from Italy and Greece with this T also...Perhaps T for Terrific?