Welcome to the forums Kevin,
Pulling out any motherboard component (memory, CPU) while your system is running is very likely to damage it. If you cannot switch off your system (for whatever reason), then you shouldn't make any hardware changes.
Replacing the DDR4 sticks while PrimoCache is still active
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Re: Replacing the DDR4 sticks while PrimoCache is still active
What InquiringMind said - RAM isn't hot-swappable. Never pull a DIMM when the system is powered on (that includes sleep mode). The only two modes that would be valid for this are Hibernating (not a hybrid hibernate), or completely shut down.
Re: Replacing the DDR4 sticks while PrimoCache is still active
No. RAM is not data-persistent after power off.KevinMcDonald wrote: ↑Fri Jul 16, 2021 3:17 am Does it mean that some of the space of the DDR sticks still been held by L1 cache
when I reallocated them to other Mobo ?