I would expect Celeron at 500Mhz to be faster than 415Mhz Pentium 2, both at 83Mhz FSB. I used overclocked Celerons back in the day for gaming and they were much better than K6-2. The key was to increase FSB speed.

Happy accidents like that are so gratifying in this hobby!

I ordered all of the CPUs I was missing around this era for fun and testing to see what the limits truly are. I hope there isn't any compatibility issue between steppings as I just purchased what was cheapest at each speed.

I have a couple of slockets but what's most interesting is that only the ASUS S370 worked with this CPU and motherboard. The other two, which are really meant for Pentium 3-era CPUs, do not. When I try to use these other slockets the system will not POST or beep and the CPU remains cool to the touch.

This is unfortunate because the ASUS slocket is taller than a normal slot 1 CPU and does not fit into the case I want to use.

This is quite relevant for 440LX owners as well. Celerons are very cheap to buy as they are practically worthless except for testing unknown boards maybe. Get a couple of Celerons and keep the one that runs at 83Mhz FSB at 500Mhz.

When I tested my slotket with Celeron 366 on 440BX, it managed to POST at 550Mhz (5.5 x 100). Slotket was set to Auto & Celeron, but still somehow 100 Mhz FSB was set. It's a cheap "370spc rev 1.0" I got for €2 (same as discussed in Coppermine 1100 doesn't work via slotket ). Booting with Coppermine Celeron wasn't successful (regardless of Celeron or Coppermine being selected on jumpers) and I didn't dare to put PIII 733 into it as it didn't behave the way I expected with the old Celeron.

My latest build is a Socket A with an Abit KT7A motherboard. The maximum multiplier it supports is 13x, so with a FSB of 133 the max CPU speed would be 1729MHz. But an Athlon XP 2400+ with locked multiplier of 15x works fine even though it's recognized as "unknown CPU at 1997MHz" 😀