If it still whines, your going to be informed the Corsair psu's are cheapo psu's and don't classify as a proper psu despite Corsair/OcUK selling them as rated psu's.
http://forums.overclockers.co.uk/showthread.php?t=18647491
Also read that OcUK pay for the return postage if the coil whine is at fault(don't know where unfortunately), but the likelihood of them testing on anything under a 1000W Superflower are remote.

http://forums.overclockers.co.uk/showthread.php?t=18647491
Also read that OcUK pay for the return postage if the coil whine is at fault(don't know where unfortunately), but the likelihood of them testing on anything under a 1000W Superflower are remote.