Noting still only operating 5 of the 6 PCI slots.
It would be an interesting data point of the attempt and failure of “12” was trying to use the 6th slot.
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About my “12” try I tried several slot combination, some using the 6th slot, so it was not slot related. I did some tried with removing the 12th card from a 1to4 splitter.
I finally end in this configuration (6th slot not used) because it is more “clean” to me.
I would like to point 2 things about this :
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I have a contact using a msi motherboard (but not this model, it is an amd cpu motherboard) that have a pcix1 slot not working for any card (an intermediate slot just after a x16 slot, maybe the 4th). I had a quick look at the mb manual and found no reason why this slot would not work (like using a m2 ssd that disable the slot).
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I myself had an issue with the 6th slot on the z390, hiveos booting fine but the graphic card on this slot not detected, i checked the gpu, the riser to finally find that the mini-card you plug on the pcix1 slot was dead. (It worked at goods reception, but went dead after a reboot), I was very surprised because it seems there is almost no electronics components on it, but it was damaged.
Hope it may help. I would suggest you to try a 1to4 splitter on any slot but the 6th to confirm there is really a pb with this slot in your particular case.
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It’s your CPU, the F series will only support 4 PCIE lanes with reliability. I had the same problem with a 9300F in a ASUS B250 board. Get one that supports video and you’re good to go.
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I guess the problem is the MB.
All my rigs are 6 cards with asrock b450 pro4 r2.0 and msi b450 gaming plus max
all run stable.
What is Your CPU?
Your MB is different, so hard to judge. What’s Your CPU?
That might be true. What CPU would You recommend?
I’ve bought 1 to 4 pcie splitter, but it came defective, as it doesn’t boot with it at all. Not even Bios screen.
What I’ve found, is: if I plug 1 or 2 GPU’s to 16x slots, and turn on the rig, it shows BIOS screen in 3 seconds.
BUT if I add more cards, it takes like 30 seconds for BIOS screen to show up. Something is confusing it, so it can’t boot as fast.
You have had some rough luck, bummer. That delay sounds to me like PCI discovery, delay, assignments. A few of my non-miner boards actually restart after GPU changes.
Althon 3000G & 200 GE, that is what I like to say.
Maybe if these problems bother you so much it is worth 100 bucks to try a different MB.
Could You explain what does it mean?
I could try different MB, but if it’s CPU problem, it wouldn’t help. Somehow I need to determine what to change first?
Here’s a list of compatible processors from Intel Intel® Z390 Chipset however there are other Coffee Lake processors will work (not listed) which are 8th and 9th gen LGA 1151 - Wikipedia explains this with handy charts. A G4900 series processor should be sufficient for around $100, just stay away from the F series for mining and make sure you get the correct gen processor.
Have you figure that out yet and have more than 4 GPU running on your MSI Z390A-pro? I have mine working for 3-4 month on all 4 of my Z390A-pro and than, one day, boom! I had the white led on, as I have no GPU available. Solution was to turn motherboard switch off before adding any more GPU after 4th. and then start with Motherboard switch (DO NOT POWER OFF PSU).
Hard power off would reset bios boot and it wont work. Waisted almost all day before figure this out. After first start and run Hiveos I can do hard reset by powering off PSU.
I have a gigabyte z390 UD running 6 gpu’s, running a pentium G5400T cpu, 8GB ram and dual 650w psu’s. This rig is all AMD cards, RX570/470 and all run on risers.
All I did was the following:
Bifurcation 8x4x4
Linkspeed gen 1
4G enable
UEFI enable.
that’s all
As seen in this post:
https://www.reddit.com/r/EtherMining/comments/lmsbvm/gigabyte_z390_ud_mining/
Yes, I’ve tried this. But as I mentioned before, if I connect more than 2 GPU’s, MB becomes hesitant to boot up. It will boot, but it takes much longer, and usually don’t last very long before 1 GPU goes missing,
I don’t fancy throwing another 100Eur on CPU, if I’m not sure if it’s CPU, or MB fault. I will check ads for used 1151 compatible CPU though.
Not sure if the MSI z390 supports bifurcation, but on my gigabyte, only 4 gpu’s worked until I changed that setting.
Honestly it is the first time I hear about it. Could You please explain where it is?