PC Cases / Accessories

Corsair Carbide 678C Review: A Quiet Case with a Mission

Carbide 678C

« Intro | Hardware Installation and Clearance Issues »

Closer Look Corsair Carbide 678C

Dimensions of Carbide 678C are 549mm x 239mm x 497mm or 21in x 9in x 20in. I have mentioned that the case is about 26Lb this is due to its steel construction and 5mm tempered glass door. Carbide 678C only has one glass side. The other side is solid without any ventilation holes.

Most of the case is constructed from rolled steel but there are few areas where combination of plastic and aluminum is used. The front of the case is made from plastic/brushed aluminum. The bezel opens up like a door to get access to 3.5″ enclosed space and air filter. The back of the case is pretty standard design. The power supply enclosure is positioned on the bottom of the case and does not have a removable face plate so the only way to mount the PSU is through the inside. Besides 8 PCI slots on the left there are two vertical PCI type slots if you wish to mount your GPU vertically.

The top of the Carbide 678C has a removable sound dampening magnetic panel and also a magnetic plastic dust cover. This case is designed to be as quiet as possible in addition to be able customize it to your liking. The bottom of the case contains one plastic dust cover that could be removed by pulling it from the front.

The entire case is supported by four plastic/rubber feet. The feet are about 20mm in diameter and provide excellent grip on flat surfaces. The tempered glass door is mounted on hinges. To stick glass door to the steel case Corsair uses a set of small glued magnets on the tempered glass.


Both left and right panels of Carbide 678C could be easily removed. The tempered glass slides up from the hinges without an issue for a quick maintenance. The solid right panel has sound dampening sheet that covers the majority of inner surface.

The front bezel of the Carbide 678C is made of brushed aluminum and the inner bezel is made from ABS plastic. The bezel door is hung by hinges and is not removable, unlike the side tempered glass door. If you have any accessories which require 5.25″ slot this case actually comes with one empty 5.25″ slot for your needs. If you don’t have any 5.25″ devices that you want to use, you can just remove the 5.25″ drive cage.

The Carbide 678C skeleton is made from steel as well. The top back left corner of the case has 4 rivets while other corners have a set of 2 rivets. Internal default cabling is being passed through the center channel and secured by zip ties. Potentially you can follow the same cable management or get creative. There are six 3.5″ slots and three 2.5″ for your storage needs.

The motherboard tray cutout is a pretty good size. Most of the ATX motherboards will have no problem in this case with CPU mounting and access to the back of the motherboard. Corsair included three fans (400-2000 RPM) which are whisper quiet under normal operation. And as I’ve tested them under a full speed only produce about 42dB.


Fans or radiators could be used in this case in the front, back or even on the top. Removal of the pre-installed fans is as easy as removing the magnetic dust and sound dampening panel and unscrewing a few screws. The I/O panel is found on the top of case and offers Power and reset buttons in addition to a HDD LED, two USB 3.1, Gen 2 Type C port and Headphone/Microphone jacks.

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