afaik Dell has not updated bios for 7060 to support 9th, but user has successfully hacked Dell bios for 7060micro to add microcode for 9th. If mini tower optiplex then full height gpu 1660 w psu upgrade up to 500w are doable. 
So im planning to buy an Optiplex 7050 with a 7th gen core i7, im thinking of putting in a graphics card to make it a gaming pc but as its a small pc im not sure if it will fit. The graphics card is an ASUS GeForce GTX 1660 Overclocked 6GB Phoenix Fan Edition HDMI DP DVI Graphics Card (PH-GTX1660-O6G) or the link -[URL] so I’m wondering if that graphics card would fit.   thanks a lot!
Optiplex 7050 SFF graphics upgrade