Articles: Cases/PSU
 

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The accessories are neatly packed, like those of the 300R, and include four screws for a PSU.

An adapter from a USB 3.0 to a USB 2.0 header is included, too. You can now connect the system case’s USB 3.0 ports to a mainboard’s USB 2.0 header.

 

The internal differences from the junior model of the series are substantial, too.

The full-height disk rack accommodates up to six disks, leaving room for expansion cards that are as long as 316 millimeters, which is enough for any modern graphics card.

The position (vertical instead of horizontal) and number (four instead of two) of the openings for the pipes of a liquid cooling system can also be noted. They are protected with rubber coverings, just like the cable cutouts in the mainboard’s mounting plate.

The fasteners of 5.25-inch devices are overall the same as in the 300R.

However, the devices can now be fixed in two rather than only one point on the opposite side of the bay.

  

The disk guides are somewhat different from those in the Carbide 300R and Graphite 600T. The vibration-absorbing element is made of black rubber rather than translucent silicone. The prongs are plastic rather than metallic and are held in pairs with two separate bars on both sides.

The CPU cooler cutout is smaller compared to that of the Carbide 300R and has a perfect rectangular shape.

 

The cable compartment is not as deep as in the Carbide 300R but easier to use because the flared side panel offers more room and can be closed without any difficulties

 

The assembly process is overall easier. The problems of the Carbide 300R have been corrected without giving rise to new ones.

The ventilation system consists of three preinstalled fans of the 120mm form-factor. There's an exhaust one at the back and two highlighted intake fans behind the front panel, opposite the disk rack. Besides, there are places for five more 120/140mm fans: two at the top, two on the side panel (positioned one above another) and one on the bottom of the chassis, between the PSU bay and the disk rack.

There are vibration-absorbing spacers on the screw holes for the optional 120mm fans but the holes for 140mm fans lack them. You’ll have to spend some time moving the spacers if you want to reduce vibrations from your 140mm fans.

The back fan has a 3-pin connector that goes into the mainboard.

The front fans have nonstandard connectors that are plugged into the system case’s sockets and then get powered by a PATA power connector. As a result, this system case allows you to control the highlighting of the fans but doesn’t allow to regulate their speed.

The speed of the rear exhaust fan connected to the mainboard was about 850 RPM. Not limited by the Silent setting, the front fans were as fast as 1230 RPM, which was audible.

The 400R is compatible with the Hydro Series H80 and Hydro Series H100 radiators (and similar radiators of other liquid cooling systems). The radiator is installed inside the chassis instead of two top fans.

 

The bright highlighting is dimmed by the meshed front panel with the perforated dust filter.

Despite the dim highlighting, the 400R looks highly effective.

Highs:

  • Compatible with USB 3.0 and can be connected to the mainboard’s USB 2.0 header
  • Good ventilation by default
  • Easy to assemble
  • Highlighting that can be turned off if necessary

Lows:

  • High fan speed
  • No adapter to install a 3.5-inch device into a 5.25-inch bay
  • Top panel has no protection against dust
 
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