Suspect this is a bios thing because with the jumpers set at 75mhz and any number up to 5x multiplier it is recognized correctly eg 3.5x75=266 but 400 seems an upper limit. The problem is there seems to be a performance fall off as if it is 6x66 instead of 6x75.
Does this happen with bioses? If they arent programmed for a certain cpu do they default to something else. Got the latest bios dated 07/16/98. Is there anything I can do about it?