yeah just intel integrated just not great, problem with that pc the lowest end PSU is 300W in the configurator and no specs on the motherboard so i cant tell what it supports.
If you have the 300w psu that be another upgrade and its gonna get costly.
Go with D3D11 if that gives no problems and maybe like @ClockworkOcean saysd, soon they might update a driver for it that makes it work better. but its using your system ram as GPu ram so thats bad too.
Ive been waiting over a year and i got an intel xe with the same issue on my laptop
good thinking, to chekc the motherboard there should be a code on it in the case just open the side door have a look. or look at the PCie slots and see if they show x16 or x8 next to them written on the board