Pci Express Slots not working?

[fuzmaster]

So I just recently built a hptc in the beginning of the year and for some reason, the video card I just bought for it isn't working or displaying anything on screen. I can still display picture through the hdmi slot on my mobo but from the video card and through every port on there, I'm not getting any picture. The video card is a nvidia 740 gt and my motherboard is a asrock 970m. Could it be something with the graphics card, cause I used amd processors with nvidia cards in the past and they worked just fine. Also note that I tried a old tv tuner on it just to make sure and it's not being recognized either.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($99.89 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($24.88 @ OutletPC)
Motherboard: MOTHERBOARD
Gigabyte GA-78LMT-USB3 Micro ATX AM3+ ($51.98 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($42.99 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($99.99 @ Dell Small Business)
Video Card: EVGA GeForce GT 740 2GB Superclocked Video Card ($87.99 @ SuperBiiz)
Case: Cooler Master N200 MicroATX Mid Tower Case ($45.99 @ NCIX US)
Total: $486.60

UPDATE: Wrong motherboard, working with someone on this, but it's actually a GA-78LMT-USB3

 

[dudio]

In the BIOS, have you tried disableing the onboard graphics to see if that helps?

 

[fuzmaster]

In the BIOS, have you tried disableing the onboard graphics to see if that helps?

I went to the bios but couldn't find an option for onboard graphics

 

[rgd1101]

In the BIOS, have you tried disableing the onboard graphics to see if that helps?

I went to the bios but couldn't find an option for onboard graphics

http://www.asrock.com/mb/AMD/970M%20Pro3/
because there isn't any onboard graphics

 

[fuzmaster]

Sorry my bad, this is the motherboard - GA-78LMT-USB3 https://www.amazon.com/dp/B009FC3YJ8/?tag=pcpapi-20