Re: GTX 260 Core 216 SSC Squeal :(
tbh I think its the PSU that causes the cards to squeal. I noticed it on my bros PC when I gave him my GTX280. With his old Corsair 620w it squeals like a pig but is totally silent with a Corsair 850w. I even RMAd the 620w but it still did it...
Just sharing my findings...I could be wrong but that is how I got rid of it on my bros PC.
Edit- rereading your post I have to say he might have had a different squeal as it only did it during game cut scenes or when in the game menus. I didn't do it while actually gaming so we might have had different issues
i7 firstname.lastname@example.org|asus p6t7ws|6gb ocz|gtx580oc sli|x-fi fatality|x25m+12tb|enermax 1kw|dell u3011 & 2405fpw