Ok, so I've ordered a new PC with 1GB or RAM (2x512), before I noticed the memory was 2x512 not one stick, I ordered another stick of 1GB (same speed) to put in it. Now, I assume the 2x512 are going to be running in dual channel, so will me adding a single stick force the memory to run in single channel mode or doesnt it work like that? Would that slow performance, or not noticeably as it has an extra gig? I know not the secrets of dual channel memory.

Thanks!