gaming gpu

My son's Customac (the Customac I have listed in my profile) is about 5 years old now. I recently updated the system from Mavericks to Sierra, as I don't have a copy of High Sierra and as I was afraid I would have trouble getting the NVIDIA graphics (GTX 660 OC) card to work under Mojave. My...

Hi I have an hp Elite Desk 800 G1 Sff with an upgraded corsair cx550 psu and i7 4790. Im running sierra and everything works great, also i dual boot windows 10 for gaming with Igpu and some widows only engineering software. i want to upgrade to high sierra ,add a dedicated gpu and run 2 monitors...