What does non-parity mean?

Should I get the non-parity RAM or ECC and why is it better or worse? No heavy gaming or heavy apps, home built computer OC'd.

ecc is error correcting ,thats for servers u dont want that cause itll slo ur overclock.. non parity i think means itll run a single stick instead of having to put matched sets in like the old edo memory..

Thanx much Flapper, now I know. Yeah man, got me a big tax refund coming so going to get another 512 stick and rock out. Have a nice week end. OldBird