Re: Is this my mother board model?
According to the eMachines website. Link here.
You only have One PCI Express ×1.
Which doesn't seem right to me. You should go ahead and check inside.
PC: Intel i7 4790K, 16gb RAM, MSI R7 250 2gb
Phone: Apple iPhone 6s 64gb
Handheld Games: Nintendo 3DS XL, Tapwave Zodiac 2, GamePark Holdings GP2X F100