Tried upgrading this card from VBIOS 62.00.60.00.01 to 62.00.60.00.70 with one of these http://www.techpowerup.com/vgabios/i...ace=&memSize=0
Needed to change the PCI Device ID and PCI Vendor ID with NiBiTor to get a clean flash with no warnings. The flash was successful and the card runs as normal, displaying the new VBIOS version in nvidia-settings.
However, I can still reproduce the X hang.
Does anyone know the whereabouts of a changelog for NVIDIA VBIOS?