Thanks for your reply 
 
 
Before you replied, i already brought some new ram another 2*2gb same kind.
Also with a new mobo as it was faulty on the 2nd ram slot. 
So with the new ram i also installed the old ram making total of 8gb ram. 
however i ran memtest86 and lots of errors appeared. 
Removing both my old ram did the trick. 
However the system can only use 2gb ram =/ , 2gb unusable now. 
Anyway to get it to read the whole 4GB ram ? 
I rechecked this, and if i installed 6GB ram 4GB is usable. 
if i installed 8GB ram , 6GB usable. 
... 
But Thansk again for the reply. When its christmas today 
 
 
merry christmas 
