PA-2006 Motherboard Item: Jumper settings for Pentium MMX 233MHz and 200MHz processors Pentium MMX 233MHz CPU Speed ---- 233 Mhz(66Mhz*1.5x) External(CPU/CLK) ---- 66 Mhz CLK1 --------- 2&3 closed CLK2 --------- 1&2 closed CLK3 --------- 2&3 closed FREQ1 -------- 1&2 closed FREQ2 -------- 1&2 closed VR1 --------- 5&6 closed (2.8V) VR2 --------- 5&6,7&8 closed And, since the board doesn't support 3.5V so this board should use 1.5V instead then the BIOS can recognize 233MMX. Pentium MMX 200MHz CPU Speed ---- 200 Mhz(66*3) External(CPU/CLK) ---- 66 Mhz CLK1 --------- 2&3 closed CLK2 --------- 1&2 closed CLK3 --------- 2&3 closed FREQ1 -------- 1&2 closed FREQ2 -------- 2&3closed VR1 --------- 7&8 closed (2.5V) VR2 --------- 5&6,7&8 closed -------------------- FIC Technical Support