Hello,
I'm very new here. As an introduction I would like to share a small achievement I made on my socket 5 Intel Zappa motherboard system. Based on socket 5, it is designed for 66 MHz FSB with a maximum multiplier of x2, hence the official best CPU for this MB (overdrive excluded) is pentium 133 (2x66). However I managed to use a Pentium clocked at 200 MHz (3x66) by doing a small modification on the CPU itself.

The CPU multiplier is set with BF0 and BF1 pins. 3x setting is obtained with BF1 pulled down to low and BF0 pulled up to 1 (default value). Since the MB doesn't allow such setting, I just modified the CPU to pull BF1 down to VSS. Intel documentation specifying "500 ohms or less" for pull-down resistors, I choose a 470R resistor, 0805 SMD size (see picture). This overrides the jumpers configuration on the motherboard.
All in all, it works very well and make pentium overdrive unnecessary on socket 5 motherboards.

Hope this helps anyone experimenting with old Socket 5 systems.
kelvak