be quiet! Dark Base Pro 900 Chassis Review

A Closer Look – Interior

The interior is all black, giving it a slick and uniform appearance. There’s a huge CPU cooler mounting cut-out behind the motherboard, as well as pre-installed motherboard standoffs, which should speed up the installation process. Around the motherboard, there are a number of cable routing holes, as well as some durable rubber grommets to help keep things looking neat and tidy.

The 5.25″ drive bay, which is completely removable should you want the extra space for larger water cooling radiator support.

There’s a huge bank of 3.5/2.5″ compatible drive bays, each is individually suspended from the frame and fitted with rubber grommets. What this means is that you can add or remove these are you wish, if you only need two, only use two, if you need a single one removing to make room for your GPU, you can, giving you unmatched flexibility.

By removing one or two at the base, you’ll also free up access to an extra fan/radiator mount in the base, giving you room for up to a 280mm radiator here.

There’s a lot of clearance between the fans and the HDD bays too, so a slim radiator should fit here without issues, and the required fans on the front panel for “push” airflow.

The PSU doesn’t mount directly to the base of the chassis, instead using an internal bracket that can be adjusted to suit the size of the PSU, while a short pass-through cable from the rear helps keep the back of the chassis looking neat and tidy. Take note, this bracket can be fully removed, and we’ll explain why in a moment.

Eight expansion slots, all fitted with reusable ventilated covers. You’ll also notice a few screws with grommets on the left side allowing you to fully remove the rear panel of the chassis.

Further up, another excellent quality 140mm Silent Wings 3 fan, as well as another screw for removing the back panel. There are screws to remove the motherboard tray too, which could be handy for extensive water cooling installation, but it has another trick. Take off the back plate, the PSU mount, and the motherboard tray, flip them around, and you can inverse mount everything, while also reversing the side panels; now that’s the kind of party trick we love to see from a chassis!

The right side panel, much like any other panel on the chassis, comes with a thick layer of sound dampening materials.

Behind that panel, you’ll find a huge amount of space for cable routing, a huge amount of cable tie loops and routing holes. There’s also a few more screws with rubber grommets that are used to mount the motherboard tray, and if you look close, you could also make out the extra screw holes, as these can be used to adjust the overall height of the motherboard tray; that could come in handy if you’re running into conflicts when using extra thick radiators.

Quick-release thumbscrews for each of the HDD trays.

Extensive routing spaces for the PSU cables, and a sizable recess for excess cable.

There’s a small PCB powered via a SATA connector, which offers up power for the wireless charging pad, eight PWM controlled fans, as well as LED lighting strip connectors; a nice all in one solution,

Finally, we have the top panel, which has even more noise dampening materials, as well as extra ventilation near the back for those plentiful fan/radiator mounts on the top panel.