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Great stuff. I had an Arctic Cooling NV5 Silencer on my 6800GT and also ran the side of the case for both cards. I can't remeber why I didn't upgrade the cooling on the x1950 Pro (possibly no room?) but it really needed doing. That style of cooler (very similar to the stock 6800GT cooler) was hopeless.
It was actually a Zalman cooler (edited!). But yeah, that style of cooler was indeed awful. In my case I didn't bother doing anything to it as the whole system was a freak that needed an overhaul (the card was running in a PCIE 4x slot on an Asrock mobo that supported both DDR2 and 3 with an E6400). Still, I miss the days of easily customising stuff that wasn't so expensive that breaking it would be the end of the world, I learned so much.