What’s your cpu? Some cpu don’t have enough pcie lanes to handle more than 6 pcie connected devices. Try to disable the integrated graphics in your mb bios to release one pcie lane.
2 Likes
Hey!
I don’t have integrated graphics.
My CPU is: Intel Core i3-9100F
Try to set all the pcie setting in the motherboard as Gen1, you may need set it in both of the two different locations. It seems your cpu can only handle 8 Gen 2 pcie lanes. You may somehow used 3 of them already. And also, try to disable UEFI support. Lastly, you may already did this, but update the motherboard bios to the latest version may help. Some other minor tips: plug in gpu one by one. Try new risers. I am also suspecting that using a 750 w power supply for 4 1660 Ti may not enough. You can also try to use the pcie spillter card to change one of the pcie ports to 4 of them. Maybe it’s just a bad pcie ports on your motherboard.
2 Likes
The integrated graph is inside your Intel CPU, not on the motherboard.
You have to use it for troubleshooting, otherwise you can’t check what is happening to the system itself between turning on and booting Hive with the sixth card plugged in.
In the BIOS set the CPU to use native clocks only, no automatic under or overclocking.
Try starting up the rig without a flight sheet.
Try fix your HIVE overclocks.
I had high LA problem on my 3060 v2 LHR cards, tried a lot of different drivers, miner versions, HIVE versions. Turned out it was the effect of a badly choosen memory overclock, wich was too high. After I had set it lower, they became stable and running non-stop since then.
i also have msi z390-a pro, first time having a problem when i try to connect 6 GPU :
3 rx 5600 xt, 3 rx 580/570/470 4GB and it was a nightmare 
manage to run all 6 GPU run using various setting / oc as state in many forum
- 2 gen pcie
- 4G memory/Crypto Currency mining to enabled
- windows UEFI settings
- using ssd / usb with rufus (UEFI) not using belena etcher (someone said not using image with .xz extension but with zip extension in the HiveOs History Image)
- disable all port sound / serial / parallel port
- powerup the PCIE power in motherboard (someone said this mobo lack of power)
- test the GPU one by one
- disable on board GPU, using the GPU 0 as display
- also clear the oc setting in hiveos seem helping
eventually this mobo successfully mine with 6 GPU , my advise is don’t change anything after you have successfully mine with 6 GPU
because i’m having a problem after takeout 1-2 GPU and trying to add a new GPU
(sold 2 of my gpu) and as for now this mobo having a problem AGAIN limited to 4 GPU 
, the problem is so frustrating
random pcie connect / disconnect , the only thing that i have not try again is build another SDD / USB using rufus with the zip image in hive history image website (too lazy to do that).
as for now i’m gonna change this mobo with another mobo.
Alright, so it’s not working with 5 gpu’s anymore. It has worked fines like 24 hours, when I’ve changed miner. BUT, today I was away for a whole day, and I was getting miner reboot, OC failed, etc messages all day. Came home, unplugged everything, left one card. So smooth… 
How can it be so difficult?
Some percentage of engineering followed by some percent luck&magic.
Not sure how many rigs you have, but it always works out that one of mine is not running 100%.
Solution: Play the odds, bring up more rigs 
have you plugin pcie power in motherboard ?
I only have one rig. And I came to the same conclusion. Unfortunatelly now 1660 super cost 625eur in my country, which is not something I’d like to pay.
Yes, I did.
Where is two locations for pcie settings, I’ve found only one. I’ve updated bios. Tried to plug GPU’s 1 by 1. It helped to run up to 5. I’ve bought pcie splitter last week, but it seems defective, as it doesn’t boot up at all with it. I only get one dot on the screen, and not even bios screen.
I’ll try to reload hiveos to my ssd. How to clear OC settings for GPU’s? Put 0’s everywhere on OC settings?
Yes, I know where it is. I’m asking what values should I put in to make it work as stock? Should it be zero everywhere?
just delete all value, because some value cannot be set to 0, except maybe you should put value in fans setting
1 Like
MSI z390 Pro
I found these settings to work. I’m not sure they are all needed, but I think these are the main two: Integrated Graphics Adapter-IGD, Windows 10 WHQL Support-UEFI, and Boot Mode Select-UEFI. These are listed below. This worked while running Linux when mining Ethereum.
Settings/Advanced/PCIe/PCI Sub System Settings:
=PEG0 Max Link Speed ->Gen 2
=PCI Latency timer ->32 PCI Bus Clocks
=Above 4G memory/crypto Currency Mining ->Enabled
Settings/Advanced/Integrated Graphics Configuration:
=Integrated Graphic Adapter ->IGD
=Integrated Graphics Share Memory ->32MB
Settings/Advanced/Integrated Peripherals:
=HD Audio ->Disabled
Settings/Advanced/Power Management Setup:
=Restore after AC loss ->Power On
Settings/Advanced/USB Configuration:
=XHCI Hand-off ->Disabled
=Legacy USB ->Auto
Settings/Advanced/Windows OS:
=Windows 10 WHQL Support ->UEFI
=Fast Boot ->Disabled
Settings/Boot:
=Post Beep ->Enabled
=Boot Mode Select ->UEFI
Thanks, although I don’t have integrated graphics.
here there was a user manage to connect up to 11 GPU for this mobo, maybe you should pm him 
1 Like
I managed to run 11 (and failed to 12) gpus on mine.
msi z390 a pro / 8 Gb RAM + psu 1200 w (hp server)
Here is my config for pci slots :
1: PCIx16 → splitter 1 to 4 : 4 gpus (4xriser)
2: PCHx1 → 1 gpu (riser)
3: PCHx1 → 1 gpu (riser)
4: PCHx4 → splitter 1 to 4 : 4 gpus (4xriser)
5: PCHx1 → 1 gpu (riser)
6: PCHx1 → empty
Video cards installed : 8x 1660 super + 3x 3060ti (lhr)
Hiveos on usb dongle
Bios settings :
- 4g enabled
- pci latency 248 clocks
- serial and parallel port disabled
- audio controller disabled
- windows 10 boot mode UEFI (don’t ask me why …)
- display : IGD (but probably not important)
I was first blocked with 4 gpus max … Someone told me about the windows boot mode and pci latency and it worked nicely : maybe only one is needed (i didn’t investigated which one or if both did the trick)
1 Like
The only thing I didn’t try is PCIE latency, which I’ll try tomorrow.