---------------------ISSUE HAS BEEN FIXED---------------------
Leaving this up for reference
Edited for easier reading.
First off, parts list:
ASRock Fatal1ty Z97x Killer Motherboard
ASUS R7 370 2gb x 3
ASUS R9 280x 3gb x 2
EVGA 1000w PSU (platinum) (powering the two 280x's and mobo)
EVGA 1000w PSU (platinum) (powering the three 370's)
Claymore miner (most recent version)
Problem: So when I first began, I was running the three 370's and one 280x with no problems. I then obtained another 280x and installed it into my system without any problems (shows up in system browser in UEFI and device manager in windows.) However, when I try to mine with Claymore is when problems arise. It gets started just fine, like normal, but when it actually begins, it says that the two 280x's are at 0.000 h/s. If I uninstall and remove one of the 280x's (doesn't matter which, tried both) everything works just like it did before the 5th card is added. What makes it a little weirder is that you can tell the two 280x's are being used somehow as their temperatures go up as well as the fan speed...but still register at 0.000 h/s. I even let it run for a few minutes to see if maybe those numbers were wrong, but they never found any shares.
I'm at a loss on what to do. I do have the ability to upgrade to windows 10, but I want to refrain from doing that as I don't think the OS has anything to do with this issue.
Update: After scouring the web more, I came across a posting saying that I need to set my PCIx1 slots to Gen 2, gen 1, and gen 1...but I can't find any way to do that in my UEFI as I'm only given the PCIx16 slots to modify.
Added image to show exactly what I'm seeing: https://ibb.co/icd605