If your motherboard can do split voltages, 3.3V I/O and 2.1V - 3.4V internal and you can get a bios upgrade. You should be able to run at either 366MHz or 400MHz. I have a PA2007 that will max at 366MHz and a Soltek 430TX that will max at 400MHz, the Soltek uses the X2 setting to get X6. Some 66MHz FSB motherboards will even run the K6-2+, so check the BIOS updates.