Techradar posted a review on the Chillblast Fusion Thunderbird PC

The Chillblast machine is one big, fat beastie. The chunky Zalman chassis gives it a real sense of presence on your desk, and the internal goodies match that sense of scale, with a heftily overclocked i5 CPU and similarly overclocked GTX 670 doing the graphical grunt work. Sadly though, it's in the overclocking department that the Fusion Thunderbird gets a serious black mark. The Core i5 3570K gets a headline-grabbing 4.8GHz clockspeed - easily the highest clocked chip in the test. If it ran solidly at that speed, we'd be all over this rig like a cheap LED strip. Unfortunately, while it boots happily with these settings and will allow you to navigate around Windows with impunity, as soon as you start stressing the chip it begins to throw a wobbly. We couldn't run through either Cinebench or X264 encoding tests without it crashing.

  Chillblast Fusion Thunderbird Review