(such as the Z420, Z620, and Z820). This message is triggered when the system detects a processor with a high Thermal Design Power (TDP) that the motherboard's BIOS believes must be paired with a liquid cooling unit rather than a standard air cooler. HP Support Community Why Does This Error Occur?
This specific string may be a log entry or a status message from a proprietary monitoring tool (like Nagios, Zabbix, or a custom data center dashboard).
Use a current meter to check if the pump is drawing power or listen closely for the mechanical hum of the pump. 3. BIOS and Firmware Updates 528cpu requires liquid cooling solution patched
Understanding the "528cpu Requires Liquid Cooling Solution Patched" Error: Causes, Impact, and Fixes
The root cause is a combination of high CPU power draw and a specific OEM design choice. Intel Xeon E5-2687W v1 and v2 processors have a high Thermal Design Power (TDP) of 150W, generating significant heat. For the HP Zx20 series, HP stipulated that only liquid cooling was approved for these high-TDP processors, and its engineering team hard-coded this requirement directly into the BIOS. (such as the Z420, Z620, and Z820)
Have a specific 28-core Xeon or 64-core Threadripper? Drop the model number in the comments, and I’ll send you the exact fan curve settings.
Navigate to the , Status , or Fan Control menu. Look for CPU Fan Speed or AIO Pump Speed . This specific string may be a log entry
The 528CPU delivers industry-leading processing power, but its extreme transistor density creates massive thermal output. Users running resource-heavy applications have recently encountered a critical system error:
Troubleshooting and Bypassing the "528: CPU Requires Liquid Cooling" Error