IMPORTANT : Before deciding which chip to go for, you need to find out 2 things about what type of wii console you have

1) Find out what type of chipset you have.

2) Next you Need to decide wether you drive has "cut" or "un-cut" pins, about 80% of consoles have "uncut" pins so chances are this is probably what you have and the above table of modchips can be used as a guide to which chip you need, although the below search should give you some sort of indication of wehter your drive pins are cut or not the only true way of finding out is to open up your console and have a look at the chip itself to see if any pins are missing :

THE IMAGE ABOVE SHOWS WHAT A CONSOLE LOOKS LIKE WITH CUT PINS

If you do have pins missing then all is not lost! you can still buy a solderless solution, the D2SUN with V5B wii clip or Wasabi with V5 Clip does not use these pins so you can install either of the chips on any drive no matter what chipset you have!