Memory?

I have a memory question.

I have 4 gig in my mackbook 4.1 core 2 (2008)

I stick is 2 gig sdram

The other is sodimm, the ram that should be inside.



When I stick another sodimm 2 gig so now I have 2 matching sticks inside my mac,

the screen will just stay on black?

When I but the sdram back in it works?



The odd thing is my system profiler has both banks as sdram?

via ehMac.ca http://ift.tt/1gbBT9i