Yes, indeed I have made posts about PC whining. That was close to 2 years ago, however, when I had that Antec Smartpower power supply. Also, that whining was present in everything I did, idle or load. Only when I run WCG and F@H togeather do I get this problem now.
I only hear this noise when running these two programs togeather in particular, so I doubt it's a fan making the noise. I've induced load with other programs and couldn't reproduce the whining noise, as I said before.