How to spot 266 Tbird 1G?

[G T i]

How can I tell if an OEM chip is 266 version? Is there something on the stepping codes that will make the 266fsb ones stand out?

[SickBoy]

The first line should start out with A1000 and the last letter should be a "C".

SickBoy

[G T i]

Thanks man, I just picked one of these up and I was didn't know how to spot it. It's an AXIA K. And by what you said and the guy who sold it to me, it's a 266fsb.