Well, i was young and REALLY into upgrading my pc! I ordered new 8800 GTS 320MB, waited it for 2 weeks... NOT patiently... believe that! Finally, the delivery guy came (not a guy, quite a hot girl for my surprize, like i needed another adrenaline rush). Got my hands on a package, opened with a racing heart, wowd like 5 times (my current was then 7600gs so this new was as thick as a brick for me), plugged it into pci-e slot, hit the power button... nothing happened. The dmn thing didnt boot... i was like after all that waiting... it dont work... tried everything, nothing worked (not much to try but i tried it all, lol). Was angry and sad, put the old one back... and went to cry over some forum, lol. Took me like half an hour to learn... that... there are things like additional power connectors. I even remeber thinking, what this little thingi is for :\ but moved on since i didnt have a clue. Well, switched it back, plugged the connector... while being afraid to burn the card with a wrong connector. Hit the power button again... watched the boot screen with glassed eyes as it BOOTED, finally! Wowed alot while doing 3dmark test too...
Yeah, scary and fun times it was...
My little story