With the arrival of the CPC664 and CPC6128 models, the existing stock of GT64 monitors was sold out and later only GT65 monitors were sold, even with the CPC464. For that reason, the 12V power outlet was designed as a socket for a cable coming from the CPC, while all other connections were made with cables coming from the monitor.
Users that had bought their CPC with a green screen monitor could also get the [[Amstrad power supply|Amstrad MP-1/MP-2 TV modulator/power supply]] as an option to connect their CPC to a TV-set in order to get color.
Another option was to make a [[TV SCART cable]] and some external power supply.