i tried in all of them obviously, all 3 of them support x16 and only operate @x8 when two or more cards are used
it's not my first build, i've been building pc's for myself and friends for about 8 years, this very pc handled 2 8800gt 512 mb (which combined use twise more than single 460) from different brands in sli for about 2 weeks, just before i got this card and it performed very well, i just thought i'll get something new and refreshing, well it aint went through as i thought it would