OptiPlex 980 Video Cards - UPDATE

So been a big time dell lover for the PC's and almost never ever given me any problems which is why I decided to buy a OptiPlex 980. I will be using this for mostly learning and some gaming. So reading the forums there seems to be next to no info on recent Video cards which can be added into the SFF chassis.

So here's my question:

1. What is Dell doing to ensure that these devices have windows 10 drivers for these machines. There are still lots out of them out there. Just because you may not make them doesn't mean you shouldn't support them.

2. When did Dell last test the newer Low Profile Video Cards that are being manufactured by companies that support SFF. Such as the :

https://www.newegg.ca/Product/Product.aspx?item=N82E16814127738

https://www.newegg.ca/Product/Product.aspx?Item=N82E16814125899&cm_re=Low_Profile_Video_Card-_-14-125-899-_-Product

3. What is the largest Low Profile video card that this device will support. Your documentation was last updated with 1 GB being the largest. Should it stand to reason that these 2 GB video cards should be supported in the 980?

I would appreciate a response as timely as possible by someone that has the info I seek.

Thank you all that respond. I do appreciate them.