Re: three rings of death
I've had the 3 red rings ... not once ... but twice. Always get a replacement plan.
Bottom-line, the issue usually isn't from overheating. Typically the issue is software (games) created for the 360 is more advanced than the system itself. Games like Gears of War, N3, Dead Rising (just to name a few), a very taxing on the 360 unit. The 360's design was very, very premature, which is why this happens.