if your computer is too big-optimize it! My had huge tower case, so I made new... with wood. Now monitor is on top of it and it all need less space. It's not only horizontal, components are rearranged so case is really smaller than old one. It's absolutely safe, on some conditions. Motherboard isn't directly on the wood, we cut part of old case made for it, and back of the new case is also part of old one, cutted from it.