The Top, Bottom, and Rear Panels
The top panel of the 650D is shown in Figure 7. It comes with a 200 mm fan identical to the one used on the front panel, and you can replace it with two 120 mm or two 140 mm fans. The top panel also has a hard drive docking bay supporting 3.5” and 2.5” devices. When not in use, you can leave this bay closed.
The Obsidian Series 650D has a three-speed, single-channel fan controller supporting four fans. This controller is very small and somewhat hidden inside the docking bay and may be missed by most users.
The bottom panel, seen in Figure 10, has an air filter for the power supply fan.
The rear panel and the interior of the Corsair Obsidian 650D are painted black. The power supply is installed on the bottom part of the case, and the case comes with eight expansion slots featuring vented covers. The presence of eight slots instead of seven allows you to have three or four video cards installed at the same time, depending on your motherboard model. This feature is usually found only on full-tower models.
There are two holes with rubber covers for passing hoses of liquid cooling solutions. The rectangular hole available at the top part of the rear panel is used to route the USB 3.0 cables, because you need to install them on the USB 3.0 ports located at the rear panel of your motherboard.
The case comes with a 120 mm fan on its rear panel (no technical specification was provided), using a three-pin power connector, allowing you to install it on your motherboard and, therefore, monitor its speed.
Let’s now take a look inside the Corsair Obsidian 650D.