![]() Voltages present on ultrabay connector are 3V, 5V, and 19V. On the Lenovo side of things, most of the other signals are power enables, power good, temp sense, fan speed, and fan tach. All the necessary PCI-e pins exist there EXCEPT for the JTAG (optional) and hot plug detect (bypassable). If svl7's bios removes the GPU whitelist, then this is as simple as re-purposing ultrabay connector by "chip-quik-ing" it and replanting it. I'm assuming all the stupid whitelist info goes through SMBus. The only data transactions between the motherboard and ultrabay are PCI-e LVDS 8x lanes and SMBus data. ![]() Interestingly the controls for the fan on the Ultrabay GPU are sent through the ultrabay connector X). I was able to get a pinout the the ultrabay connector, and it is totally possible.
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