We have some issues with your 7045A-CTB (X7DCA-I main board) in combination with a Tesla C160 card and NVidia 8400GS the system does not POST and gives three error beep codes. If I remove the Telsa C160 card the system boots up fine. We have checked the Telsa C160 card in another platform and it's functional. What could be the issue?
Please update the main board BIOS to Rev. 1.1A or later, and make sure to put Telsa C160 card in Slot #6 (PCI-E x 16) and the Nvidia 8400GS in slot #4 (PCI-E x 4), this setup will work.