Originally Posted by McSteel
"Presence pin" is the intentionally shortened one at the very beginning of the PCI-E connector. So the motherboard will be made aware of the card's presence. Those caps filter the incoming signal from the PCI-E slot. It could very well work, as these are low capacitance (1-50nF) AC coupling caps. It's not like they're not needed, but they may be non-essential. Try the card, and let us know how it went.
+1... that 'sense' pin is what generally tells a mobo there is a card there. Not sure how the need is after that, if it will/can skip borked lanes like that...
I vote on try it as well...