I used it in 1999/2000 in my general PC. I was running Windows NT 4.0 and then Linux 2.2.
I used a pair of Celerons 366 (sometimes with overclocking to 550 MHz).
I remember it was quite a problematic board. Furthermore, it was actually quite difficult to use the dual CPU for anything meaningful back in those days. You had to use a non-mainstream OS and even then there were some limitations as to where the second CPU could do something useful. Yes, you could run early distributed computing clients or split your own tasks in multiple processes/threads but that's about it. Even for content media encoders/players it was quite uncommon to use multiple threads back in 2000.
I also remember compiling software using gcc compiler in multiple threads with "make -j" option in 1999/2000. When it worked it was great. But often it failed due to dependency problems and you were back to single thread compilation and investigating why it didn't work...
Often certain hardware drivers didn't work well on SMP system even on Windows NT 4.0. Linux kernel in those days had a big global lock so anytime a process switched to kernel mode it blocked the second CPU. So the performance suffered. Only the first CPU was processing the interrupts otherwise you faced problems. Often distros didn't have SMP enabled kernels so you had to compile your own....
Gaming was also difficult as Windows 98SE was the target OS of pretty much all games back in the days. And it had no SMP support. I remember running Quake II in Linux / Windows NT and even experimenting with some SMP tweaks in the console that were supposed to enable SMP in the quake engine, but there was little or no difference.
Yes in theory it has the horsepower, but a normal single PIII or even overclocked Celeron was just as good if not better.
Later I used it in a internet server. but it was short lived use as I found the board to be unstable for 24x7 use.