hmmm... can you be more specific? It all depends what you are inquiring about.
What line of OCZ 800MHz are you referring to? Gold? Platinum?
What kind of processor/ mainboard are you going to run? Ds3? 6300?
(if oc'ing) What are you clocking for? Games? Video Editing? General use?
You are very right, SubtleWordplay, we need more info in order to help.
But according to his specification of "XTC", i can infer that he is talking about the PC2-6400 Gold GX XTC memory, wich is great memory if u arent looking to overclock. It dosent have the best IC's but it will run at 6400C4, wich is enough for most ppl.