My wife kept getting the blue screen of death on her PC so I thought I'd spend 20 bucks on new RAM and see if I could get it working. The original RAM is hymp112u64cp8 -y5 ab-t so I bought 2 sticks from Amazon. They sent me a stick of hymp112u64cp8 -y5 ab-t and 1 stick of hymp112u64cp8 -y5 ab-c. When I put it in, the computer just beeps. Are these 2 completely different types of RAM? Is the hymp112u64cp8 -y5 ab-c stick incompatible with my motherboard? My mother board is Foxconn N15235.