Gamecube GCDual HDMI and analogue video mod

Available now (handled by our partners BetaGamma Computing in Greece). Please allow for shipping and processing delays due to Covid 19 and a recent cyber attack on the Greek post office. Please note that we can no longer accept mod/repair orders from UK customers (except NI).

All repair/modification work is carried out subject to our terms and conditions. Once you have placed your order, details of where to ship your hardware will be sent to your e-mail address. Prices do NOT include return postage.

GCDual is the ultimate AV upgrade for your classic Nintendo Gamecube console. Free yourself from expensive component cables and analogue only connections with this all in one solution. GCDual adds the following features to your classic console:-

HDMI output – Full HDMI output including audio, with optional line doubling of 240p/480i sources and optional scanlines. Note that GCDual uses a Mini HDMI port.

Full analogue output – Output ANY Gamecube resolution via the standard analogue port. Need 480p via SCART for your OSSC or XRGB Mini? No problem! It’s also possible to get RGB output for NTSC consoles.

No more rare and expensive component cables – Use a standard SNES SCART cable with a breakout adapter for component (YPbPr) video.

OSD control – Access GCDual’s settings from a convenient OSD which works via a standard Gamecube controller. To activate the OSD, hold the L, R, X and Y buttons down until the menu appears.

The Nintendo Gamecube GCDual upgrade powers up your classic console with a fully digital HDMI output port that supports both video and audio. All Gamecube screen modes are supported, 240p can be line-doubled to 480p for full HDMI compatibility, while interlace modes can be either line doubled or sent directly to the display. All line-doubling is done on the fly, there’s no frame buffer and therefore no input lag.

To learn more about this fantastic mod, check out our review of the original HDMI Gamecube mod here, and our updated review/overview of GCDual’s new features here.

Remember, in order for your Gamecube to be compatible with this mod, it MUST have the “Digital AV Out” port at the back of the console. Later model Gamecube consoles that do not have this port are unfortunately not compatible.

Note – GCDual configuration jumpers – Unless otherwise instructed we will set up your GCDual for use with a standard CSYNC Nintendo RGB SCART cable that has an attenuation resistor on the sync connection. This is the correct setting for 99% of users. If you need a different configuration please let us know, but please be sure you understand what you need. All available options are documented here.

This mod provides audio and video through the HDMI cable, but a very small number of HDTVs may be incompatible with audio/video mode. In this case, audio can be disabled through HDMI and routed through the consoles analogue output to a suitable receiver as normal.

If you prefer to DIY fit your GCDual, click here.

Nintendo and Gamecube are trademarks of Nintendo Co., Ltd. GCDual is NOT an official Nintendo product.