I've removed the pushpin heatsink for the card's VRMs(I have no new thermal padding to replace the insulation with.), it is not overclocked and is fed air.
Am I okay to leave it like this, is there anything I should know?
More abouteah5830 heatsink
So let me get this straight.. You pulled off the padding that separated the VRM's with the HSF?
I wouldn't suggest thermal grease as it may be a bad idea to use. I'd suggest getting a new thermal pad. I don't know where to get them but a place I used to work for had a few of the 3M pads laying around. That'd probably be the best option for you.