Getting 5th GPU to Mine with MSI Z270 Gaming Pro Carbon Motherboard

[ryanodell81]

I am new to mining and I have just built my first mining rig.

HX1200i PSU
5x EVGA Geforce GTX 1070
Intel Core i3 Processor (i3-6100 LGA1151)
Memory DDR4-2133 UDIMM 8GB
SanDisk SSD Plus Solid State Drive 120GB
MSI z270 Gaming Pro Carbon
TRENDnet AC1200 Dual Band Wireless USB Adapter
Windows 10 64bit

The problem I am having is that I am getting the Code 12 error below:

***This device cannot find enough free resources that it can use. (Code 12)

***If you want to use this device, you will need to disable one of the other devices on this system.

I have tried uninstalling and disabling nearly all of the different system devices, changed the bios settings, reinstalled the drivers, reinstalled windows 10 and have been googling and reading everything I could find but I still cant fix it.  So I registered my account and am giving this a try.  I have read that other have got 6 GPUs working on this motherboard so I cant figure out why I cant even get 5 to work.  Please let me know if you have worked with the MSI z270 Gaming Pro Carbon Motherboard with this problem or if you have an idea of what I need to disable to make my 5th card work.  

I moved this to the beginners section as that probably is a better spot for my beginner questions

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[MATHReX]

Let's make a checklist for troubleshooting, shall we?
First, Head to BIOS and update it.
Second, Enable 4G Decoding.
Third, Check if any x1 or x16 lane is problematic by heading to bios hardware detection section. (Google it)

This should be enough to solve your Code 12, inefficient resource available.
Reason: This problem pops up because our motherboard, in usual is made to work with up to 4 GPUs, after which resource allocation becomes an issue, for which enabling Above 4G Decoding enables resource availability for fifth GPU and so. In most cases, this is the solution for it.

[georgekkenney]

Your site has well managed information about it.It may help you for the long race.Hoping that there will be no race in which your motherboard will be defeated.