Extremely high CPU temperatures detected, possible sensor issue.
Extremely high CPU temperatures detected, possible sensor issue.
Hi, I’m facing an issue with my new CPU. Here’s my configuration: i5 3570K, ASRock Z77 Pro4, Corsair 650 TX v2, and a SPC Spartan 923 cooler with thermal grease. I have two 4GB Hynix DDR3 1333@1600 modules. Previously, I had an i5 3350P running at 3.6 GHz, which worked well under stress with temperatures around 67-72°C. After upgrading to the 3570K and setting it to 4 GHz, the temps jumped instantly to 100°C. I checked using SpeedFan, Open Hardware Monitor, and the GPU-Z temperature for the HD4000. The heatsink seems properly positioned and clean, but nothing changed. Then I removed the CPU and replaced the old thermal paste with a new one. At idle, temperatures dropped to about 29-30°C at 22°C room temperature—so it doesn’t seem like the connection is the problem.
Another possibility is that the cooler is too small. A few years ago, I had an Athlon II X4 model at 2.9 GHz and 3.4 GHz with 95W TDP; its temps never exceeded 80°C. With an Xeon 1240v2 (essentially i7 3770), they stayed under 83°C.
There’s also a big difference between the individual cores, fluctuating a lot—like from 75 to 90 and back in a second—which didn’t happen with my previous CPU. I think there might be an issue with the temperature sensor. Heatpipes near the CPU are around 45-50°C.
Here’s a screenshot under stress:
My conclusion: temperatures rise immediately from 30°C to 100°C under stress.
1. The connection to the cooler might be incorrect, though I’ve checked several times. Maybe the thermal paste is degraded?
2. The CPU sensors could be faulty or it might be drawing more power than necessary.
What do you think is the problem?
Edit: After several hours of troubleshooting, I examined the CPU and heatsink closely and found burned points on the corners of the CPU die. I believe the paste I used is either old or counterfeit.
when examining the details from the screenshot, I observed a voltage reading of 1.34v and a frequency of 4300Mhz. given that the i5-3790k typically turbo-charges to around 3800Mhz, this suggests you may have been overclocking your processor. if that’s the situation, could you explain the source of the heatsink and fan you’re using? if it’s the original Intel part, then the issue likely stems from its inability to efficiently dissipate heat, as it wasn’t built for overclocking. if you’re not aware of the overclocking, I recommend resetting the BIOS on your board and testing without the overclock settings to see how the CPU heats up under normal conditions.
1. Does the thermal paste exhibit a lot of "breaking" appearance?
2. Is it possible to manually adjust the fan speed to 100%? Since this will bypass the sensor, the fan will remain at 100% to identify whether the issue is with the sensor.
3. The CPU can be protected if its temperature stays below 90 degrees.
Does the thermal paste appear to have a lot of "breaking" character?
Can the fan be set manually to 100%? Because doing so will take precedence over the sensor and keep the fan at 100% until it determines if the issue is with the sensor?
The CPU should remain unharmed if it operates below 90 degrees.
when examining the details from the screenshot, I observed a voltage reading of 1.34v and a frequency of 4300mhz. given that the i5-3790k typically turbo-charges at around 3800mhz, this suggests you may have been overclocking your processor. if that’s the situation, could you explain the source of the heatsink and fan you’re using? if it’s an original equipment manufacturer (oem) part from Intel, then the issue likely stems from that component not being suitable for overclocking. since it wasn’t designed for such conditions, it won’t effectively dissipate heat under normal operation. if you’re aware you’re doing the overclock, I recommend resetting the bios on your board and testing without the overclock setting to see how the CPU heats up during regular load. alternatively, if you’re intentionally overclocking, it’s advisable to invest in a high-quality heatsink and fan to protect the CPU from damage due to excessive heat.