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No true modchips exist yet, as all current chips operate by modifying the DVD drive in some fashion. Until that time, Drivechips have shown great promise in enabling many new features of the Wii.

Presented here is a list of currently released drivechips and their features.

Comparison

Key: Supported Partially supported Not supported
Chiip Cyclowiz WiiKey Wiinja OpenWii WiiFree yaosm Wiid WiiReZ d2ckey Argon Wasabi D2Pro
v0.9.1 3.6 (beta) 1.9s 1.9g 1.9b V2 Deluxe 2.4 2.51 3.0 V3 1.8 (beta)
Wii Originals
Backups
SMG-Protection
DL Originals
DL Backups
Region Free
Homebrew Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha Trucha
GC Originals
Backups
Region Free $ $
Homebrew
Action Replay  ?  ?
Media DVD-R
DVD-RW
DVD+R
DVD+RW
Dual Layer
Features Speed Fix  %  %  ?  ?
Audio Fix
Multi Disc
Multi GC Games  ?  ?  ?  ?
Led Support
LCD Support
Configuration DVD
Upgrade via Cable
via DVD
Flash Memory 8KB  ? 8KB 1.75KB 3.5KB 8KB 1.75KB 1.75KB  ?  ? 1Kb  ? 128KB  ?
Open Source  ?
Chipset DMS
D2A
D2B
D2B cut legs °
D2C
Install Quicksolder
Solderless ∴
Wires 5 5 6 5 5 5 5 5 6 5-7 31 13 or 17 5-DMS/D2A/D2B

9-D2C

5
IC ATmega8L 2.78€  ? 2.78€ 2.78€  ?  ?
ATtiny2313  ?  ? 1.69€  ?  ?
PIC16F628A  ?  ? 1.27€ 1.27€  ?  ?
PIC12F629  ?  ? 0.68€ 0.68€ 0.68€ 0.68€  ?  ?
PIC12F675  ?  ? 0.74€ 0.74€ 0.74€  ?  ?
PIC12F683  ?  ? 0.87€ 0.87€ 0.87€  ?  ?
MSP430  ?  ? ~3€  ?  ?
Price Hardware 2.78€ 30€ 25€ 11€ 25€ 0.68€ - ~3€ 0.68€ - 1.27€ 0.68€ - 1.27€ 25€ 17€ 43€ 45€ - 90€ 60€ 45€
Software Free! Free! Free! Free! Free! Free!
Stupid color indicator §
Chiip Cyclowiz WiiKey Wiinja Wiinja OpenWii WiiFree yaosm Wiid WiiReZ d2ckey Argon Wasabi D2Pro

Trucha = using Trucha Signer
† Via WiiFree EasyConnect
∴ Via Wlip
§ =RGB(Red cells*10, Green cells*10, Blue cells*10). White cells ignored. Choose the greenest modchip! ;)
° Supports D2B chips with cut of IC-legs, without rebuilding them.
% Indeed fixes the reading speed to 3x but doesn't allow setting it to 6x for backups!
$ Can't play PAL backups if region free is enabled (even on PAL Wiis) - for originals region free works flawlessly!