* '''Size: <span style="color:#ff0000">???x???</span> mm'''
[[File:GX4000 PCB Top.jpg|200px|left]]
* '''Board: 2700-017P-4, MC0123C, Copyright 1990'''
* Same chipset as CPC+, but lacks Keyboard, Expansion Port, Printer Port, Tape/Disc Interfaces.
* Additional Scart Connector and TV Modulator.
[[File:GX4000 PCB Top.jpg|200px|left]]
* '''Board: 2700-017P-4, MC0123C, Copyright 1990, K1'''
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[[File:GX 4000 MC0123C K4 bilgisayarlarim 736001086319 MA.jpg]]
* '''Board: 2700-017P-4, MC0123C, Copyright 1990, K4'''
* Looks same as above (only the "K4" text near the LED changed).
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[[Image:NoPicture.png|100px|left]]
* '''Board: 27...?, MC...?, Copyright 1990'''(without TV modulator)
* Version without TV Modulator installed, and with IC101 replaced by 4 transistors (used in French models; where the PAL modulator would be useless).
* See [[Media:GX4000 12.jpg|this picture]] (might be same mainboard as above, not sure - the photo doesn't show the boards part number; hidden behind the cartridge slot, one thing that IS different is the K1 vs K3 text near the LED).