A server administrator receives an alert that a critical database server's temperature sensors are reporting abnormally high readings, consistently above 85°C for the CPU and chipset, even during periods of low utilization. The server is located in a data center with a functioning HVAC system, and other servers in the same rack are reporting normal temperatures. What is the MOST likely cause of this issue?
- AThe server's BIOS firmware is outdated.
- BA malicious cryptomining process is running in the background.
- CThe thermal paste on the CPU or chipset heatsink has degraded.
- DThe server's power supply unit (PSU) is failing.
Show answer & explanationAnswer & explanation
Correct answer: C. The thermal paste on the CPU or chipset heatsink has degraded.
Given that the data center's HVAC is working and other servers are normal, the problem is localized to this specific server. Consistently high temperatures, even at low utilization, strongly suggest an inefficient heat transfer mechanism within the server itself. Degraded thermal paste is a common culprit for poor heat dissipation from the CPU/chipset to their heatsinks.
Why the other options are wrong
- A. Outdated BIOS firmware is unlikely to directly cause such extreme and localized overheating, especially at low utilization.
- B. While cryptomining would cause high temperatures, it would also result in high CPU utilization, which contradicts the 'low utilization' aspect of the scenario. This makes it less likely than a physical thermal issue.
- D. A failing PSU might cause power issues or general system instability, but it's less directly linked to consistently high CPU/chipset temperatures at low utilization than a thermal transfer issue.
Thermal Paste Degradation
Thermal paste (or thermal grease) is a compound applied between a CPU/chipset and its heatsink to improve heat transfer by filling microscopic air gaps. Over time, it can dry out and degrade, losing its thermal conductivity.
- Crucial for efficient heat transfer from components to heatsinks.
- Degrades over time, becoming dry and less effective.
- Leads to higher component temperatures, even with adequate cooling fans.
- Replacement is a common maintenance task for overheating issues.
Memory trick: Think of a server's heat like a campfire: too much heat, not enough escape routes.