Region-Free Gaming
Imported games from other countries won't properly play without a modchip. A region-free modchip offers you unlimited gaming from countries all over the world. Either version of the Wii Key modchip has region-free games. Other region-free modchips include Wasabi DX, Flat Mii and Infestus Wii. Once installed, the Wii will play any game from any country and automatically load them from the Wii Disc Channel.
GameCube Compatibility
Early versions of Wii modchips had audio and playback of GameCube games from around the world. When searching for modchips, search for those with the best GameCube compatibility. For example, WiiKey V.1 had several issues with GameCube games, all of which were fixed for the V.2 release. GameCube compatibility also affects the DVD and media playback. The CHiiP offers media playback for every type of disc, including burned DVD videos and GameCube games.
Soldering
Soldering is the process that connects the chips to the physical hardware of the Wii. This delicate process should be attempted only by experienced users. The best modchips for the D2B version of the Wii eliminate soldering and allow the modchip to connect directly through four ports supplied on the D2B chipset. Diagrams come with the Wasabi Wii and Flat Mii to simply plug and play the chips right into place. This saves time and potential damage to the Wii console.
Updates
Former versions of Wii modchips forced users to open up the Wii console, remove the modchip and make adjustments. Newer models allow software updates directly through the USB port on the Wii. The Infectus Wii modchip allows online support and direct downloads to upgrade the firmware and keep the modchip up-to-date. The Flat Mii offers a Wii connect from your computer to control the updates and connect wirelessly to your Wii anytime.