So your cards runs hot, repaste it, replace leaky pads. They sell them from China for a couple bucks. Same colors and probably even source as those used on retail GPUs, don't dream that they are using some crazy high end thermal pads there. You can buy some better pads, if you believe the marketing, from say Akasa and other more known brands in computer parts shops, some sell these but they cost 10x such as $20 instead of $2 and that's for a 10x10cm piece.
The TCXXX ones are cheap, but the Grizzly ones are hella expensive. Although, they sell them also in 10x200x# sizes, so i guess i can cut them down.
I know that the oil by itself is not an issue. But would a GPU need a thermal pad on the back of it, directly pressing against the PCB and its components (not like VRMs/Memory chips),
You need to change the TIM on the GPU die and replace the thermal pads as needed. backplate thermal pads will dissipate heat off the PCB into the place, but tat only works well if the case has good air flow. The backplate thermal pads is not the overheat issue, its mainly your GPU that needs attention more than anything.
Yeah I removed my back plates
They do protect the back of the card too but I was just messing around testing and really haven't noticed a difference with or without
But if you have sweating you should remove and redo thermal paste if it does not have cooling fans get a add on air cooler or something.
It's the paste on the GPU die. The pads on the back are whatever. A card with a back plate typically runs the same temp as one without. It acts as a heat spreader. My Gigabyte 1080Ti only had paste on 2/3 of the GPU. I was amazed when I pulled it apart and saw that. If the damn thing wasn't a golden chip, I would have done an RMA just because. Take the cooler off. I'll bet the paste was poorly applied and now that it's aged some, you're seeing bad performance.