I put together my new i5-2500k system today and when i went to startup my radeon 5870 eyefinity 6th edition cards in crossfire there was an incredibly loud long beep sound followed by a shutdown and restart. I ran some further test and showed that the sound was only coming from one card, so is this a DOA card or something else?
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what power supply are you using? it could be faulty. Also, try re-seating the cards in the slots.
The PSU is a corsair 850WHX professional. It isn't faulty b/c i have 2 of these cards and the other one is working just fine.