Change the multiplyer value in your bios and then see if it posts at a higher speed. I'd set the FSB to 133 when doing this the 1st time. And for higher multiplyers, add a little vcore so it'll be stable. Then from windows check it with something that can read cpu speed like MBM or Wcpuid. Also test for stability with prime95 or Sandra or something. Test all the multiplyers, or just the "near" ones.... if you can't post, try to add some more vcore or if you're really stuck, reset cmos. If some mults work and some don't, it may be only partially unlocked. If only the very high multiplyers don't work, give it some more vcore, or just accept that maybe your cpu can't take that kind of strain.