You need to do some serious checking on those suggestions. The BM6 doesn't support the fcpga 600, 633 etc. I've just been trying to get a Celeron 600 cCO stepping to run in my BM6....so far this is what I've found out. Even though the bios download on Abit's site says the BM6 will support the celeron 566 and 600 most of the time it won't. The pinout on ppga and fcpga are different is the reason. There are exceptions... a later revision BM6 (rev 1.2) will run the celeron if it is a cBo stepping...it still won't run the cCO stepping.
You can get an adapter made by Powerleap (Neo S370)that will let you run the fcpga chip on the BM6, ZM6 and BP6 motherboards. On the Powerleap website there are a bunch of reviews....the one by HardOCP hit the problem i had right on the head....the power came on but no vid etc....they called Abit's engineets and was told that the BM6, ZM6, BP6 weren't compatible with the fcpga chips. I checked some of the newsgroups and there are numerous posts about this problem. If this information is wrong, please let me know, and where you found the information on how to use these chips with the BM6.
Thanks, Ben