Maybe it's a good thing that it is so heavy. With that many fans, if you turned them all on high, the rig would fly away!
Yup, I reckon it would! Even on half speed.... if it weren't so heavy. The case on its own is 24kg, though the Coolermaster website says it's 22kg. It's actually what's inside that weighs the most. You wouldn't think a few PC components, things like CPUs; RAM; SSDs; graphics cards and optical drives would weight that much, but last time I weighed the beast, it was 78kg. Mind you, there was 13 Hdds in it as well.
I've added another 3 since then, and another 2.5" SSD, giving me 2 x 250 gigs for additional OSes. Given the lousy direction Windows is heading, I'm thinking I may dual/triple boot with Linux Ubuntu and/or Mint to get a better user experience before Win 10 pisses me off entirely and I throw it under the bus. There again, I do have a pretty decent third machine with 3x 120 gig SSDs in RAID for Linux distros, meaning I can boot the Intel machine faster with just the single OS.
Hmmm, decisions, decisions. And I still have an XP machine that's connected to the main TV in the lounge room for gaming. I also have 4 old cases and the parts to build another 4 machines that I can hand-me-down to family members when needed. That's the thing with upgrading/building new PCs... the many left over parts that I have accumulated over the years. And do I ever throw any out? Nope! Even old DDR 1 RAM, just in case somebody ever needs it.