A:Answer The H510 does NOT have the hub in it. The H510i does. You will know based on the price. The non-hub variant only cost $70 atm whereas the one with the hub costs around $100 on Newegg. To my knowledge, the one with the hub (H510i) is currently not available on Bestbuy's site.
As for your second question, your Graphics card should have no issue fitting in this case. I have a 3 fan, triple slot AMD RX 5700XT and it has plenty of room inside.
IMO, if you are really needing the hub, you can likely find one on other sites for really cheap and pick up the H510 for the lesser price if you really want to get it without resorting to other e-tailers.