making a connection in the slot shouldn't be any issue at all, can you post a link to a pic of the exact card?
do other cards work flawlessly ruling out the motherboard slot?
unless something on the card is getting hung and you aren't noticing.... which is totally possible because some of those big cards are a B*** to wrestle into the slot, every tab seems to want to catch on anything it can until... POOF perfectly flaps in.
I've got one machine i hate taking the card out for that very reason, I know im going to do it 3 times.
you could also try inserting angry card into another machine and see how it behaves.