Recently decided to upgrade my computer's ram. Currently running two Corsair Vengeance 4gb DDR4 2400mhz sticks. Tried to remove old ones and upgrade to two Corsair Vengeance 8gb DDR4 2400mhz sticks. After new sticks are installed and I try to startup, computer just boot loops. The monitor never gets to turning on and I have not been able to enter BIOS at all. After thinking that maybe the sticks were faulty, I returned old ones and got two new ones that are identical but I still have the same problem. Motherboard is a Gigabyte GA-X99-Gaming 5. Thank you for any help.