Could possibly be heat but I already have a pretty significant cooling system. I have heat syncs on my RAM cards, a fan mounted to the heat sync on my processor and a case fan. Im moving a good bit of air through the case but its still real warm coming out.

Like I said the funny thing is now, I can fly all day as long as I dont bring it in close. If the plane gets within 10 feet or so from me I get an instant lockup. Its weird.

Go Figure.