The Tekram P6B40D-A5 Dual Pentium II motherboard is a relatively inexpensive way to run two processors with BeOS.
The BIOS with which it ships, however, does not work properly with BeOS R4. Symptoms of this include „crunchy“ audio, poor shell script performance, and abysmal performance when CPU 1 is switched off using Pulse.
The problem is that the BIOS does not enable the cache on the second processor. Upgrading the BIOS to version 1.03 will fix this (You need the AWDFLASH.EXE program as well).
Also note that „A“ Celerons will not be recognized with a BIOS version prior to 1.02.