Dell t430 very loud fan noise with pcie ssd
This is the expected behavior when inserting a third party PCIe card.
This default behavior can be changed as described in Disabling a Third-Party PCIe Card Cooling Response with Dell PowerEdge Servers [broken link].
Relevant excerpts:
/admin1-> racadm set System.ThermalSettings.FanSpeedOffset Off
/admin1-> racadm set System.ThermalSettings.ThirdPartyPCIFanResponse 0
Update: newer generation of Dell PowerEdge Servers do not use this settings as the global behavior has evolved.