Pc doesnt work normaly after adding ram

Shock0

Honorable
Apr 21, 2013
39
0
10,530
Recently my friend bought a new ram (4gb stick) he had 2 gb one before , he tried booting up the system with both of them then he gets black screen
with small thing flickering on top of screen . both ram stick have same voltage , same frequency and same manufacture
Note:The bios reads the ram as 6gb , and the system works with the 4gb stick alone perfectly
The ram is kingston
The mobo is GA-G41M-Combo