they put that warning there now because lat year when gigabyte came out with there top mb an overclocker put a video up of one frying when it was brand new going into burn in. the issue at the time was that durning burn in or over clocking with the new digital vrm you could pull more power then the vrm could supply and cause them to burn out and catch fire. some vendors had to run new bios code that would not let the end user pull more power then the mb could give. the parts on a mb are rated for some overclocking but in a burn in test your maxing out the ram..cpu..video and power supply at 100 percent max. sometime doing that can be harder on the mb then what it rated for.