Hi sunday I purchased 2 Dell computers with 1.8 p4s. I plan on selling these computers to some guys that work with my dad. They both expect to get p4 1.6s. I plan on putting my 1.6a in one of them if these computers have 1.8 c1s inside. What i need to know is how to tell if these chips are c1s. Where to look and what to look for. If any of you guys are interested and have a 1.6a in your system I am willing to trade the second 1.8 c1 if they are c1s for your 1.6 + $50. Let me know.