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Odds and ends
Being a somewhat upscale enthusiast enclosure, the 650D offers substantial cooling capabilities thanks to three fans: two 200-mm behemoths mounted at the front and top, plus one 120-mm exhaust fan located at the rear.

Since the front fan draws air into the case, and the other fans blow that air out, Corsair stuck a dust filter on the front fan only. To remove the filter, simply push the top part of it until you hear a click, then let the filter swing down and free itself from the case. Once you've cleaned out all that nasty dust, you can slide the filter back in place.

A fully assembled system will probably have one additional fan sucking air into the case: the one on the power supply. Thanks to a vent in the 650D's bottom panel, the large intake fan on a typical enthusiast PSU will draw in fresh air directly from outside the enclosure. A conventional case would position the PSU at the top of the chassis, which means any air sucked into the PSU would have already been heated by system components. Corsair also puts a dust filter on the bottom vent, ensuring that air sucked into the PSU should be relatively clean.

The 650D doesn't disappoint on the connectivity front. Corsair keeps dual USB 3.0, dual USB 2.0, FireWire, stereo, and microphone ports behind a small door you can easily push open.

Upstairs from that happy family—and behind a small sliding panel—lies the enclosure's Serial ATA hard-drive dock, which has a little spring-mounted separator to ensure that any 2.5" drive you insert will be held steady. (The weight of a 3.5" drive will cause the separator to retract.) This compartment also houses the fan controller's diminutive slide switch, which lets you choose between low, medium, and high fan speeds.