Dont flame me please, . I know sort of what they are but not really what they are. My Viewsonic VG150 15" LCD monitor, and Windows XP gives me the default of 60 hz. With my options higher, being like 70, 72, and 75 I believe. What should I be at. Does this affect my performance, please explain these. Thanks. Whats the best fo games, etc. Thanks.