My mobo has two pciex16 slots so I intalled in the one labeled "PCIEX16_1" (rather than _2) and I think the installation went ok. It could've fit in either one but the mobo or the graphic's card manual didn't specify and they were labeled the same. As far as power, am I supposed to plug anything into the mobo or the psu after installing the card? No manual said that.

http://www1.sapphiretech.com/us/prod...gpid=245&grp=3
Product page.