Product showcase – interior

The Corsair Carbide 678C is equipped with one 140mm fan in the front. Unfortunately, it isn't from the ML series which we are a bit of a fan off, pardon the pun. You can install up to three 120/two 140mm ones instead. This amount of space is enough to fit even 420mm radiators (when the ODD is removed, or 360mm with it).

You can mount standard AIO radiators (with fans that are typically 25mm wide) in the front, but also some more beefy ones. Without the HDD cages - there is about 90 mm available

The backside of the Corsair chassis is clean, and it should be easy to route all the cables properly in there.

The clearance varies depending on the place where you measure it. It’s a little above the 10mm range on the right-hand side (this can be a couple mm too few in some scenarios, for example for the EPS cable).On the left side (where you’ll be routing the PSU cables) the situation is much better, with 35mm of space available.

At the lower-left side, there is space for up to two removable HDD/SSD cages. The standard cables include USB 3.0, USB 3.1 Gen 2 Type-C (not every motherboard has headers for that), and front panel connections (with HD audio), as well as one SATA connector (for the fan hub). The cabling is black, which improves the aesthetics of the whole package.

It’s possible to connect up to six 3 (Voltage regulated)/4 (PWM)-pin fans. The plug coming from the hub is connected to the motherboard for fan control.