I have never personally overclocked one of the SCSI P2B models. After all, they are mostly used for servers and I tend to be very conservative with those.
P2B-LS BIOS Ver. 1009. 05/10/99
1.Microcode update for Intel PentiumŪ III 550 CPU upgraded to revision 005.
2.Fix for serial port failure running Windows 2000.
3.Added keyboard wakeup item with three choices of key combinations for models with W977 I/O chip.
4.Fix for CPU clock detection error when speed > 512MHz.
5.Upgraded L2 cache reference code to Revision 3.4.
6.Added microcode update support for PIII C0 stepping. (550MHz part)