You can see a seat for a fan at the front panel. You can install an 80mm, 92mm or 120mm fan in there. Before you install your drives into the external bays, you have to tear off the appropriate brackets (pushing them out from inside with a screwdriver is the simplest method).
The screw-less drive fastening system is very simple in this system case. There are three types of retainers for three types of drives (optical drives, hard drives, and card-readers or floppy drives). The method is the same with every type of the retainer: the juts in the retainer are inserted into the appropriate holes in the case opposite the drive’s screw holes. Then you turn the retainer around to fix the device in its bay.
This simple mechanism does its job surprisingly well. My optical drive and hard disks proved to be securely fastened in their bays. The only disappointment is that you have to use screws to install hard drives into the two bays designed for card-readers/floppy drives (they have differently positioned screw holes and thus require different retainers).
Funnily enough, there is only one external bay (judging by the faceplates in the front panel), but there are two card-reader bays in the rack. It is unclear what devices are supposed to be installed into the second bay because I don’t know of any other type of devices with the same fastening. It would be better if this bay had a sixth screw-less retainer for a hard drive.
The assembly process goes smoothly. Everything is predictable, including some problems concerning the layout out of the cables inside the case. System cases that provide some space behind the mainboard for putting the cables into are handier but also considerably more expensive.
And finally, I will tell you about the differences of the GZ-X3BPD from the other two models from Gigabyte.
The photographs make it clear that the Gigabyte GZ-X4BPD differs from the above-described model with its exterior design only, i.e. with its front panel. The interface connectors are now in the middle of the case (this is good as system cases of this size are usually placed on the floor), the buttons have moved down, and there are now stylish vent slits in the side panels. That’s all the difference, actually. I guess this version will be appropriate for a home computer.
The Gigabyte GZ-X5BPD is similar to the Gigabyte GZ-X3BPD in its exterior design, but has two external 3.5-inch bays and its Power button is located lower. The three models share the same uniform chassis, which explains the odd internal bay with fasteners for an external device that I noted above.
There is yet another cosmetic change here. The front-panel connectors of this model are covered by a flip-down lid. The selection and position of the connectors have not changed, though.
Gigabyte’s system cases came to our labs together with Delta Electronics GE-C400N-C1 power supplies.