I need to replace one of the memory sticks in my desktop (Intel). I don't speak Technoslavakian, so I'm really lost. I have a 240 pin MT16JTF25664AY 1G1d1. Of course, I have no idea what that means. Below there are other numbers 2RX8 PC3-8500U-7-10-B0 & then DDR3, 1066, CL7. I'd like to increase the memory to accommodate the 30+ tabs I seem to always open when researching case law. But looking for new memory, I find variations with these same numbers . Some have only the first set, then different other stuff, some have the DDR3 etc, but different first sequence...I apologize for my pathetic description but can you tell me how I know what is interchangeable?