Pc doesnt work normaly after adding ram

[Shock0]

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

 

[IInuyasha74]

Even if they are from the same manufacturer with the same specs there is no guarantee the RAM will work together unless they are the exact same model. If he wants more than 4 GB of RAM then he will need to purchase a second 4 GB RAM stick which is identical.