DoubleTwin Hard Disk Vibration Absorption Mount
The DoubleTwin is Nexus' solution to a problem silent pc enthusiasts have been solving for years using nothing more than hair elastics. The problem you ask? The noise created by hard disk vibration which is merely amplified when those hard disks are screwed tightly to a case. DIY'ers in the silent pc field would often suspend their hard drives between hair elastics to essentially "float" the drive away from the computer case framing so the vibrations could be limited. The DoubleTwin is a bracket that allows two drives to be mounted, one going right side up and the other flipped upside down (this brings the drives closer to take up less room). Since the drives themselves are too thin to fill a 5.25" drive bay, there are two long pieces of steel-re enforced rubber coming off each one. Each of the two pieces lines up perfectly with the mounting holes in your 5.25" drive bays. With a total of two per side, the drives are essentially floated away from the case walls, thus eliminating heavy vibration transfer and noise.

Installation was simple: screw the drives to the brackets and the brackets into the case. When they were installed I was surprised to see the amount of movement the rubber mounts provided! Giving a push down on the drives revealed a decent amount of flex for the unit which can only help to reassure you that the drives are making as minimal contact with the case as possible.

When my system was ready to boot up again after installation, the lack of hard drive rotational noise was clearly evident. Even when the drives had to spin up to read/write or defrag, I could hardly hear the difference in noise levels (a task that used to leave me well aware when my drives had to spin up for something!). Although they do a great job in reducing rotational noise, unfortunately you are now left to listen to only the read/write sounds of the drives because even a bracket like this can not tackle that form of noise from within the drive.