Sigma Unicorn Mid-Tower Case
Author: Rutledge Feman
Editor: Shawn Knight
Date: 06-04-2008
Provided by: Sigma Products

Back in December, we reviewed the Raidmax Aztec. Raidmax owns Sigma, so it makes sense that their cases would have very similar designs. Indeed, the Aztec and the Unicorn appear to have exactly the same internal stamp.

As we said before, the side-panels on the case swing open in a butterfly style, which should make for easier motherboard installation. Following the red LED color scheme, the external bays come complete with a red plastic tool-less installation system. As detailed in a sticker on the floor of the case, drive installation using this system is quite simple, though a little bit clumsy. To install a drive, the plastic piece must be unlocked and removed, then the drive can be slid and positioned according to one of the five pre-drilled holes, finally allowing you to replace the plastic piece and lock it back down.

At the back of the case, we see the exhaust fan and the expansion slots. The covers on the expansion slots are bend-off, so if one is removed it cannot be replaced. This system is also not tool-less, which would have been a convenient addition. As you can see in this picture, the case comes with six pre-installed motherboard standoffs. Only two are included, though, which means you'll have to go without one if you don't have extras.

Moving to the right side of the drive bays, we see the option for another 80mm fan, as we noticed before. This fan cools your two external 3.5” bays and gives extra airflow to the case as a whole. This system is entirely tool-less; to install a fan, simply swing out the brace and snap it in.

Sigma included a support bar in the Unicorn that runs along the left side-panel. This steel bar not only adds to the structural integrity of the case itself, but also houses an 80mm intake fan and PCI card support braces. The bar swings out and can be removed entirely, keeping it out of your way if you have an extra wide VGA cooler, or you simply don't like the looks. Taking off the front panel, we get a better look at the red LED intake fan, as well as the wiring from the front IO and the power buttons/LEDs.

Underneath the HDD cage, there is a small red plastic box that can be stored for safe-keeping. Inside the box, you'll find all of the drive rails and screws necessary for moving into the case, as well as a case speaker. There is also a manual included with the case, free floating during shipping.

Along with a removable motherboard tray, the hard-drive cage can be removed. A removable hard-drive cage is always helpful, not only easing installation, but also allowing for extra room if you're willing to put your hard-drives in the 3.5” bays. If you install your hard-drives in the cage, there are four sets of rails with which you can slide in your drives without tools.

Installing the motherboard is generally easy, due to the removable tray, but it was complicated by my tall CPU cooler. The CPU cooler would collide with an installed PSU when trying to install on the removed tray, but a PSU cannot be installed over a tall cooler if the motherboard is already in place. More conflicts arose when replacing the left side panel, for the CPU exhaust fan collided with the CPU cooler. In order to replace the side-panel, I simply removed the included exhaust fan.

Now that everything is in place, continue on as we wrap this up with some notes on usage and conclusions.

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