Hello everybody. I recently upgraded my RAM to 8gb ( Corsair Value Pack..it's all I could find here in rural Thailand that was compatible with my machine)...anyway, since the upgrade i get occasional crashes that involvle the screen flickering with colours and fast clicking noises on the audio as if the machine gets stuck in a 1/2 second loop..the only way to stop it is to do a hard power down. I ran Memtest and it resulted in the same crash again. I hope it's just a RAM problem but am worried that it could be more serious and that the fact that I installed new RAM is just coincidence....any suggetions ? Thanks in advance for advice. Anth.