If its the cable you can always to things the poor man's way and wrap it with tinfoil paper, and then cover it all with insulation tape.

I will try another cable.
Anyway what could happen with an ssd in a m2 slot? There is no shielding in that config.

Changing the SATA cable did nothing, the crackling sound while HD is working persists.

I think it's because in the Fractal design CORE3300 the SSD is mounted behind the motherboard tray (as an option I adopted), maybe it's not properly shielded.

The QX6700 has been mounted, now I get this:

It's the best I can do for with 4 sticks of RAM, it appears that the 865PE chipset is limited to that quantity. Right?