The thing is that it does want to boot up, but it gives no signal to my screen. So I started testing and looking around the forums to try and pinpoint the issue.

As far as I have tested it gives me error code 99 (Asrock 990fx extreme9) with 2 different cards, in all slots.

I want to make sure it is not my primary graphic card, so I will be testing it in a friends system.

I do want to as you guys if this error is most likely faulty PCI-E slots on the motherboard and the likely choice would be to just replace it, or if anyone else have had the same experience with a similar motherboard and found a way around this issue by other means?

My specs: 

Asrock 990fx extreme9 motherboard

Asus 970gtx strix GPU

AMD fx 8350

Corsair AX850W powersupply

Corsair vengeance 1600 2x 8gb ram

So other than that, I am able to enter bios, after I clear cmos it allows me to enter for a while and then it just going black screen efter a few seconds, not allowing me to do anything.

It seems the more rest I give the computer, the longer the screen will be on, but eventually it will just turn off and say "No signal"

So far the ideas I have heard from friends are that it could be the shipset controlling the pci-e slots, that this chipset is faulty. My other question is, if this is correct or is there anyone else who have any ideas to what it could be, before  go purchase a new motherboard? If it is an issue with the motherboard.