I couldn't wait for Saturday to do something about the vibration, so I got home from work tonite, unscrewed the grommetized mounting screws, and slipped in some relatively thin pieces of closed cell foam under the pump. Huge Difference!!! It is really quiet now. The pump just sits on the foam - no screws. The tubing more or less holds it in place and I don't plan on moving the system around. decode diesel, you really nailed this one!
While I was at it, I re-did my case fan configuration a bit. I added a side case fan (mounting bracket was already there), switched the front and back fans to some high flow Panaflows and ran 'em at 7v. The case fans are now quieter and I think the total airflow is about the same.
Also, for some reason my CPU temp via MoBoMon dropped about 3 degrees C! It might be that the side case fan that is blowing right on the waterblock is cooling off the Soyo in-socket thermister. I know these things are not very accurate, but I haven't been inclined to add a Digital Doc.
Anyway, I'm really pleased how these last few tweaks worked out. Thanks!
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