The Obsidian cases are Corsair’s most high end range, with the 900D as it’s flagship model. The rest of the range consists of the 750D, the quiet 550D, the micro ATX 350D and the mini ITX 250D. There was still room for a mid-range ATX model in between the 750D and the 350D and that is exactly what Corsair has introduced with the Obsidian 450D, a mid range ATX case with modest dimension while still offering plenty of room for full sized ATX motherboards. The 450D is very interesting if you are looking for a good mid-range case that won’t break your bank account. We tested this new case from Corsair and weren’t disappointed.