== Advantages ==
* Z80 The whole computer runs with 6 MHz* 50% faster. Z80, Bus runs , RAM, CRTC run with 6 MHz, GateArray with 24MHz, Soundchip with 1.5MHz* FDC is 50% faster* , Disc formats with 50% more sectors can be usedafter adjusting the DOS paramaters* Sound that is programmed specifically for a 6MHz CPC can be sound better, since the PSG runs more quicklythan on a 4MHz CPC* Games can run more fluid
* Graphics are better, pixel are about 1/3 smaller in X
* By adjusting the CRTC an higher frame rate can be used (75 Hz)
== Disadvantages ==
* FDC Floppy disc controller also runs at 150% and can't no longer read old or write standard disc formats any longer. ** It is not possible to exchange discs with a 4MHz CPC.** a DOS must be used that allows to adjust disc parameters. Parados or CP/M are said to work. Unfortunately the parameters have never been documented or shared, so the values need to be figured out by anyone who tries the mod.
* Not every hardware expansion is able to work with the 6 MHz bus speed. So also other options to load data and programs on a 6MHz CPC can become difficult.
* Not all GateArrays will work with a 24MHz crystal
* RAM should to be at least 160ns fast. Many CPCs only have 200ns RAM built-in. Replacing RAM requires to desolder the old RAM ICs.* Z80 might need being replaced by a 6MHz capable version. Pay attention to get a NMOS version of the Z80 as the CMOS version has different behavior for some undocumented but (rarely) used opcodes* Sound must be reprogrammed / patched. No patches are publicly available.
* The horizontal timing of the CRTC is affected. In order to get a stable image, you need to program register 0 at 95 (96 characters line) and Register 2 at 61 (centering for 40 characters default)
* Pixels are no longer square. Their pitch is 66.7% of their original pitch.Theses pictures show this fact (320×200 mode 1 pixels with black border)
<gallery>
Image:12062011055.JPG|Original CPC @16Mhz
Image:12062011054.JPG|Overclocked CPC @24Mhz
</gallery>
* Sound must be reprogrammed
== Software ==