I'm trying to connect my third monitor to my Compaq desktop without much success. I recently got the GeForce 9800GT PCI-E graphic card that works well powering two monitors. I have an old Nvidia FX5500 PCI that I would like to power a third monitor.
My Compaq desktop has only 1 PCI-E x16 slot, one PCI-E x1 and one PCI. When I put the 9800GT by itself, it works fine. When I connect the FX5500 into the system, the fan on the 9800GT went to 100% and stays there when the system comes up (pressing the power button does that). The FX5500 works fine when I connect it by itself only. Together, the fan on the 9800GT is uncontrollable and is very loud... like an aircraft taking off.
In the past, I have a Dell with a GeForce 8600GT that appears to have the same problem when I added the FX5500.
Do you have any suggestions or tips to help me solve this problem? It is baffling since the only way I can drive 3 or 4 monitors is by using a 2nd PCI video card, and this doesn't seem to work.