motherboard abit nf7-s ram 2 1 gig sticks pc 27000 gforce 6200 512 vid card 500 watt psu 160 gig WD 7200 rpm amd athlon xp 2600 1.9 So i added new ram pc 2700 1 gig ram 2 sticks and my computer locks up and restarts randomly and will sometimes loop when starting up, it doesn't matter what im doing it will do all of these!! When i put back in my old ram 256 and 512 my computer goes back to being stable!! So to me once i hit 1 gig of memory the computer locks up or restarts whenever it wants to!! All my motherboard drivers are old and same with bios, So basically to sum it up i use whatever drivers that come with the motherboard cd!! I don't know how to upgrade these im kinda of a noob lol.