Currently, I have a Duron 700 Mhz Slot A and I want to upgrade to a 1.4 Ghz Athlon Thunderbird. I have checked my clock multipliers which are 7x and my bus speed which is 200 Mhz so I thought I could upgrade (7 * 200 = 1400), but then I saw my core voltage was only 1.6 volts so I don't know if I can upgrade because of that.