Hello Everyone, I see reference to Classic and Thunderbird slot A processors and was wondering if they are interchangeable in slot A motherboards or does the mobo have to support the Thunderbird technology for the cpu to work? In particular, I have an ASUS K7V with VIA KX133 chipset. It just says it supports up to 1 Ghz Athlon processors. I currently have a 500 Mhz Classic Athlon in it, but want to upgrade. Does anyone know if I can put the Thunderbird in this mobo? Thanks in advance, Dennis Thiel The NOSPIN Group provides a monthly newsletter with great tips, information and ideas: NOSPIN-L, The NOSPIN Magazine Visit our web site to signup: http://freepctech.com