I've been trying to change the multi on my 1.2GHz T-Bird by opening and closing bridges... I set the multi from 12 to 10.5. I put the chip back in, boot up, and NOTHING. I tried redoing it 3 times, and still nothing. The screen won't even turn on. I'm getting nervous, so I try to set it back to x12 and hope the chip is still good. As I'm about to put the chip in, I see my RAM on the table. I forgot to put it back in, so now I'm going to redo the 10.5 multi and see if it works.. WITH the RAM this time.