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be quiet! Dark Base Pro 900 is a case with unrivalled flexibility and modularity. As with all be quiet! cases, it’s very silent and well insulated. It feels that it’s designed for enthusiasts and individuals with high-end builds in mind. be quiet! Dark Base Pro 900 is a big case, measuring 577 x 243 x 585mm (L x W x H) incl. stands. It will fit 420 radiators in both front and top and 280 radiator in bottom with a 140 radiator in the rear. ven if I personally feel that it’s a combination of some of the spots. Especially with dual 420 x-flow radiators it will be a tight fit, but possible.

be quiet! Dark Base Pro 900 has numerous modularity options to satisfy most modifications and options. One major feature is the possibility to mirror the entire case for both right and left desk placement. It’s almost only the motherboard tray that is bolted to the back panel. Most other internal components, drive bays and brackets are held in place by bolts, screws and rubber fittings to ensure a modularity piece of art. Art that stays vibration and hassle free.

Be Quiet! Dark Base Pro 900 case review
be quiet! Dark Base Pro 900 case expload – image from bequiet.com

The case comes with three pre-installed Silent Wings 3, 140mm PWM fans and 2 be quiet! led strips, all controlled from two controls in the front panel and the internal fan controller mounted behind the motherboard on the back side. With the size of the case and the usual short cables in most fan manufacturers it will still be hard to fit without fan cable extensions, which is something to notice when ordering fans when building in Dark Base Pro 900.

The case modularity continues with movable mounting brackets for the PSU in the bottom and with the option to lower the entire motherboard tray. Something I personally found isn’t doable is if you want to opt for a PSU cover or even secondary floor as with my build Zeuligan. Then you need to keep the motherboard tray in its upper most position.

Be Quiet! Dark Base Pro 900 case review
be quiet! Dark Base Pro 900 HDD bays and brackets – image from bequiet.com

The only negative thing I must say about this case is something I feel most case manufacturers miss and that is those extra 30mm in the top of the case. I just don’t get why, for a case so obviously targeted to modders and gaming enthusiasts, the top height is so tight it’s not possible to fit a 60mm rad without hitting your motherboard. Especially with today’s high end motherboard with extra big coolers and high brackets. If you want a clean look and want to go for radiators and fans inside the top of the case, then make sure to go for a thin radiator, 30mm or less. Mostly for the looks, but still for space, I will go for radiator outside of the inner case and between the upper aluminium /plastic panel and the frame of the case. Leaving room for the standard 25mm fan height inside of the case and still some air between the fans and motherboard.

I still feel, wholeheartedly that for a case for custom water cooling builds, particularly for a modder and enthusiast, the be quiet! Dark Base Pro 900 is hard to beat. For me it is currently the case to get and I would love to build a few more mods on this amazing case. Don’t let the price intimidate you as you need to factor in that it’s fully modular leaving many options open in the future. It’s also delivered with the 3 SilentWings that bought separately count for almost 40% of the total price of the case. Compared with that net price, it’s even lower in price than most competitive cases.

The package even includes a lot of extra bolts and screws, case brackets and an extra SSD fitting bay. Surprisingly no extra rubber grommets as they easily gets lost when modding.

Be Quiet! Dark Base Pro 900 case review
be quiet! Dark Base Pro 900 extra bolts and brackets included in the packages – image from bequiet.com

I give it an 9 out of 10 Z’s in rating and the only thing stopping it to get 10 Z’s is the top height of the internal case, preventing 60mm radiators.

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