What is the maximum memory capacity of my Supermicro X8DTH-iF?
The maximum memory size of the X8DTH-iF is 384GB ECC / 48GB according to manufacturer.
The phs memory® option for my Supermicro X8DTH-iF is faster than the existing RAM - Is this a problem?
If your system is limited to a slower memory speed, the "Fallback Speed Setting" in the SPD of the phs memory® RAM-Modules ensures the support of slower memory settings down to the given memory speed.
Will the legal warranty of the device expire, if I install a new memory module?
The legal warranty right of your X8DTH-iF will not be affected if you install the memory yourself.