Well like I said in that other thread I'm not really concerned with what it should sound like with the panels on. All I'm concerned with is the fact that I've had other cards in there with the panels off and have not experienced the same annoying fluctuations in pitch. Moot point now of course since the stock cooler has been replaced
I thought all the dust that must cake in there (computers tend to attract somewhere around 1000000% more dust than anything else for instance) would help dampen the sound with the panel off.