I used it with 2x 466Mhz Celerons on stock speed. It was my first experience with SMP. When compiling something with 'make -j1' on one CPU, Netscape 4.5 would run smooth on the other CPU.

It did crumble under load though. Compiling C++ software would fill the CPU caches and the shared memory bus at 66Mhz could not handle all the I/O.