> "Whereas IBM's PC (and almost all PC compatibles) had a power supply in a corner of the main case, the PC1512's power supply was integrated with that of its monitor. The monitor had sufficient venting to cool itself by convection, instead of needing a fan. The PC1512 was therefore quieter than other PCs. Rumours circulated that an Amstrad PC would overheat, and while existing owners would note that this did not happen, new buyers were discouraged. As a result, later models had a cooling fan integrated into the main case."
> "Whereas IBM's PC (and almost all PC compatibles) had a power supply in a corner of the main case, the PC1512's power supply was integrated with that of its monitor. The monitor had sufficient venting to cool itself by convection, instead of needing a fan. The PC1512 was therefore quieter than other PCs. Rumours circulated that an Amstrad PC would overheat, and while existing owners would note that this did not happen, new buyers were discouraged. As a result, later models had a cooling fan integrated into the main case."
[1] https://en.wikipedia.org/wiki/PC1512