Bought this unit (first single G5 made) used. Runs excellent except it has never run quietly in the corner. I believe the PS tends to whir away. It's not the chirping or buzzing reported on the dualies, but a consistent whir/hum. Is this something Chud Tools (workaround for dualies) would alleviate? I'd love to get this thing down to a whisper. I don't mind the fan ramping up on occasion, but this sound is always there.