Thanks for joining the processor community.
I understand you are experiencing processor overheating issues.
I would like to know if your computer is running the latest BIOS; see the link below for BIOS downloads:
As per Asus specifications the minimum BIOS version for 4790K support is 1008, if you are running a newer BIOS, please try to downgrade to 1008.
Please test the processor by following this sequence: If 1008 works then try 1104 and then try 1203 (the latest version).
Looking forward to hearing from you.
cpu : i7 4790k
m/b: msi Z97 gaming 5
case: coolermaster haf x fans 3x200mm(2 top intake/exhaust+1side intake) 1x230mm(front intake) 1x140mm(back exhaust) 2x120mm for gpu/ram inside
cpu cooler:noctua NH-D15
the cpu run stock speed/volts/mhz
room temp: 28c /cpu temp idle 30c /mb temp 34c
with MSI(R) Intel(R) Extreme Tuning Utility stress test in half sec 70c+ when finish in half sec 34-36c
thermal paste check twice after tests
fans speed 50% 75% 100% almost the same temps +-3c