It worked with my old Ram. But my old one is 2gb 800mhz. If i put only the new one which buyer says it's 4gb 1600mhz laptop won t turn on it stays with black screen.. But i opened with cpuz and it show same mhz at the 4gb. 800 mhz instead 1600? It my be because i have the 2gb at 800mhz?
Should i...