For a 333Mhz CPU, your settings should be:
CPU Speed: 2083mhz
CPU Frequency Multiplier: 12.5
CPU External Frequency: 166
Memory Frequency: Auto
CPU VCore: 1.650V
Have you updated your BIOS to the latest version? The latest version is 1006, check when your machine boots and see what version you have. If it's earlier, you can download version 1006 from
here. Read the manual for how to load it.