Hello. I upgraded the memory of my MBP to 4GB (2x2GB) last year. Is it a good idea for me to sell the RAM (2x1GB) which originally came with the laptop? Due to the infamous Nvidia GPU problem, will Apple refuses to service the laptop for free if they know that I am using RAM bought from other companies? They exchanged the motherboard for me once. There was no problem even I did not put the original RAM back to the machine. I guess it might depend on who services the machine. Will the resale value of the entire laptop goes down if I do not have the original RAM (even it is 2GB in total) in the laptop? Thanks.