|On a V3, which doesn't have switch SW4 and has a single-plane CPU power configuration, you can only use Socket-5 compatible CPUs without soldering mods. This includes the P133, P166 non-MMX, P200 non-MMX, WinChip and WinChip2. Of these, the WinChip2 has the highest performance. The Intel CPUs will probably trip the current limit and/or run too hot, but YMMV.|
With some minimal soldering mods, you can go upto 300 Mhz with an underclocked AMD K6-III+/450.