That is a Mach V CPU and only usable on a Kansas motherboard, which were only used in the 8600 and 9600 250, 300, and 350 mhz models. The resistor you are probably looking at is the one in the lower left on the backside of the board. If you look closely you should see a tiny resistor next to the 250. These are really just identifiers and not the actual resistors that set the clock speed.

Temetka,

There were no 400mhz Mach V's. Some people have them because you can sometimes overclock the 350mhz models by relocating a resistor. Not all 350's can do it, though, and it is risky as the soldering requires a very steady hand and good eyes to prevent destroying the board.