As far as i know you can use either lemme look around to confirm this<img src="/images/smilies/wink.gif" border="0" alt="" title="Wink" class="inlineimg" /><br />
Edit: Ok i've looked around and i don't see why it would be a problem... the only proble you might run into (if it seems to be working fine in slot 2) is that it may think there are two cards and ramp the speed down to 8x, instead of 16... so watch out for that.<br />
Otherwise from what i've been reading it shouldnt' be a problem... i would just try it!
manual says to keep it in the top slot.<br />
it might work in the bottem slot, but the manual does specifically say that if you are only running one card, it should be in the top primary slot.
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