Hello, On my Tyan S1830S "Tsunami" (a venerable AT mainboard, with AMI BIOS V2.00.02), I recently replaced an Intel Pentium III 600E processor (Slot 1) with a PIII 1GHz (FCPGA Socket 370, product number RB80526PY001256). Each of these is 100MHz FSB, which is the fastest the S1830S's 440BX chipset officially supports. (I also needed an adapter, so I bought an inexpensive "Super Slocket III," off eBay <[URL]http://www.ebay.com>[/URL].) Anyway, everything seemed to go smoothly, except for the fact that the new CPU only runs at 900MHz! The BIOS and various utilities [including the latest version (7.1) of Intel's own "Processor Frequency ID"] all agree on this issue, too. The chip is using a 9x multiplier (i.e., 9 x 100MHz = 900MHz), instead of the proper 10x, apparently. I've tried different BIOS settings, such as temporarily increasing the FSB to 112MHz, which results in approximately 1GHz (9 x 112MHz). Alas, that causes system instability (e.g., AVI files always crash). As all PIII's are "clock-locked," how can I >safely< get the full 1GHz out of my purchase? Incidentally, according to an Intel Web page, the RB80526PY001256 is "for existing embedded applications using the Intel® 440BX chipset only." Could this have anything to do with my current problem? Please, reply to the newsgroup, exclusively; thank you, in advance, for any helpful information. Cordially, John Turco <[email][/email]>