Question Not picture to monitor with installed graphics card

[compProb]

A friend suggested I get a PCIe card to increase my upload/download speed on my computer which I mainly game on. I got a INTEL(R) GIGABIT CT DESKTOP ADAPTER, plugged it into my computer and when I started the computer up I got no picture to my monitor. I assumed I accidently shorted my graphics card and got worried I did something wrong or did't install something before plugging in the PCIe card. I took out the PCIe and got a replacement graphics card. Plugged the new graphics card into my computer and got the same result, no picture. My computer works, picture and everything without a graphics card installed. But even a brand new graphics card did nothing. I have not tried reinstalling the PCIe card, because one problem at a time. How do I get my computer run with a graphics card? What did I do wrong with PCIe card?

Processor
Intel(R) Core(TM) i5-7600K CPU @ 3.8GHz 3.79 GHz
Motherboard
ASUS MAXIMUS VIII HERO
Graphics Cards
OLD - NVIDIA GEFORCE GTX 1050Ti
NEW - NVIDIA GEFORCE GT 1030
Power Supply Unit
Corsair HX850i

 

[rgd1101]

What connection on the gpu to the monitor are you using? what the monitor?