I was given a Dell 690 which I upgraded to a T7400 and that may be pivotal. I changed CPUs, Motherboard, PSU, RAM, front USB tray and graphics card.
Currentlyits running 2x 3Ghz Quad core Xeon 5472 if memory serves, 8Gb 1600Mhz RAM and a GeForce 8800GTX.
The problem I have seems to be the opposite of most - the big fan in the middle of the case that cools the processors only ever runs on tickover. I do 3D animation and video editing so regularly need ot leave the machine for days sometimes at 100% CPU and I cannot do that at the moment without external fans blowing air into the machine's front vent.
Is it a BIOS setting or a heat detector that may have been disconnected? Help please! 🐵
Did you re-use that fan from the 690 or...? And is the fan connected to the new motherboard?
Dell OEM fans typically have a sensor in them that BIOS uses to control fan speed. Fans are usually specific for one or just a few Dell systems. So if you used the old fan, it might not be compatible with the replacement motherboard...