ass i was installing everything, i kind of dropped a small sticker into myv psu its a hx650 its a sticker that says "for 8pin connection" ? will it cause major / minor problems, i tried getting it out but couldnt ?
As long as it's not obviously impeding air flow from the fan it won't do any harm, unless it's a 'metallic' sticker. You can fairly easily open up your PSU to remove the sticker, but be sure to disconnect from the mains supply first.
If you still have warranty then I would not open it up. Also have you tried getting a can of compressed air and blowing it through the fan, might bring out the sticker. Anyways I would not worry about the sticker, I know my power supply has a sticker on the PCB and it does nothing to it (I did not apply it myself, it was already there).