Hello,   When iDRAC unsupported hardware is installed, it will run cautiously and its fans high as a cooling measure. In 14G, can you try the following commands; Also you can review this article "PCIe Card Cooling with Dell EMCPowerEdge Servers"   [URL]   Hope that helps!
We recently bought a batch of Dell T140 servers to install as in-office servers. We chose the T140 because Dell's product description matches our intended use case; i.e. we need small on-premise  servers to connect our POS terminals to our main servers. Typical servers are too big and loud for our small single-room locations. When we installed our new servers, we quickly noticed that the servers were generating a lot of noise. Upon further investigation, we found that this noise was caused by excessive cooling due to the presence of third-party PCIe cards. These PCIe cards are required to control our equipment. Searching online, I found this article that details a method for disabling the default automatic cooling response on PowerEdge 13G server for third-party PCIe cards. To my understanding, this method would configure the system to allow normal automatic cooling response to remain intact while preventing excessive cooling. Does a similar method exist for the T140? I tried the 13G method on one of our T140 servers but got the following response:     Kindly note that I am very inexperienced with Dell servers (we're a new customer and that this is our first order) so apologies if I overlooked something that should be obvious. Service tags for all purchased servers are available if needed.
How Do I Disable The Third-Party PCIe Card Default Cooling Response On 
PowerEdge T140 Servers?