Nodens is correct. The processor has intrinsic overheat protection, it is not an Asus feature. However, in most procs Intel gave us the option to shut it off in the BIOS - I am highly opposed to doing this, it's like a policeman in a gunfight taking off his bulletproof vest. Intel gave no option to change the temperature. And the CPU only downclocks (the multi) to reduce the heat generation, meaning it just slows down for a while. You can see this in CPU-Z (if you push it too far). However, it has been my experience that the Vreg downclocks the CPU way before the CPU reaches TJmax - with six-core CPUs. You can see this as dropping Gflops over about 10-15 mins time in LinX - less time if you push it too far like >5GHz - without a Vreg water block.
Now you could probably find or make a Windows utility that shut down the computer when a CPU core hits a certain temp, but I'd assume you intend to run it during OC tests, meaning your computer is likely to lock-up during testing, and on such lock-ups the software would fail to shut your computer down, making it useless to you.
i7-3930K; Asus RIVE; G.SKILL Ripjaws Z 4x4GB DDR3 1866; MSI 7870 2GD5/OC; Crucial M4 SSD 256GB;
Corsair 1000HX; Corsair H100, 4x Excalibur 120mm PWM CPU Fan p-p, AS5; SB X-Fi Titanium Fata1ity Pro;
Dell U2412m IPS 1920x1200; Cooler Master HAF 932 case; Tripp-Lite OMNIVS1500 UPS fully Line-interactive.
(EVGA site: )
And I have a second (wife's) computer,
Eve.Overclocking is useless to me if it is not rock stable.