For those of you with OWC:
I ordered the 4 gig upgrade set, had it replaced once because of freezing issues but it is still freezing! The chips they sell are 2, 2 gig Nanya chips. I contacted someone in their customer service department and the lady said call back tomorrow (i was on chat, not the phone) when their phone service opens and tell the person who answers that the computer still freezes and they will replace my nanya ram with samsung ram. just letting you guys know!