ok try re seating the ram, going from the nearest to the cpu first, then working back ( depends how many sticks you have) let the pc run, user the pc as you would normally and see how it runs, if you get a Blue screen then this will create a file called a crash dump, these are normally located c:/windows/minidumps.
cpu z and passmark only display information about your pc... a bit like a tv guide showing whats on the tv i suppose
if any alterations need to be made then we can tell you how
If u want to test your ram....
The ram can be tested with the memtest86+ progam, put this ona usb stick, boot up from the usb stick, ( might hve to change the boot order in the bios, but its not hard so if you get stuck we can help ) let the program run on its own, no need to change any settings, let this run for 7 passes, ( the pass count is the one in the middle of the screen that you will see ) it took me about 3-4 hours, for 7 passses but the time can vary depening on the pc.
1 stick at a time in the 1st slot then once 7 passses have gone put the SAME stick in the 2nd slot,
then
2nd stick in the first slot, 7 passes later, same in the 2nd slot,.
you will see any errors appear in the middle , and plus it says error count 0 to possible 1, 2, 3, and so on,,,,
upload any crash dumps on here and i will get you more information on what caused this, we will sort it ...
AND CONGRATUALTIONS ON GETTING THE INSTALLATION COMPLETED
good luck and i hope your pc runs ok