Thin walls like a tin can with sound insulation glued on, apparently for rigidity, but still the vibration from the hard drive basket (by the way, the sled has a backlash) and from the case itself is practically not felt. From the very noise of hard drives, nothing saves when they turn off (one ssd is working) silence is grace. The modular design allows you to remove the hard drive cage and install a fan, or you can install one hard drive in place of the cage. The wires on my power supply do not come unfastened, with the help of Velcro, I was able to lay them all quite easily and close the door easily. I’ve been using it for a year now, I’m generally satisfied, the case is really quiet, I’ll say this, it dampens quiet noise, that is, noise from fans at low speeds and unpleasant noise from chokes. It stands two meters from the bed, I leave it for the night and sleep peacefully. As for the wall thickness, I compared it with zelman z3, this fractal design has definitely thicker walls.
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