I don't recommend removing the RAM's heatsink.
Depending upon your MOBO, set the memory using the XMP and Profile 1 then look at the new VCCSA Voltage value. Now if it were me and the XMP Profile loads a VCCSA of 1.25v then I'd manually adjust it down to 1.15v~1.20v and run Memtest for 4-full passes i.e. overnight and if you wake up to no errors and Memtest is still running then leave it at the lower value.
Alright, thanks. So that VCCSA readout will change automatically when I change XMP in the BIOS right?
Also, If i test this kit on my friend's build and see that all is well would the same apply when I put it into my system (don't have all the parts yet)? That is, does XMP profile/ VCCSA readout change as a function of which CPU/MOBO I'm testing it with? Or is a good kit good regardless of what system it goes into?