Can't mine with third card

[AIcrowser]

Just seeing this now…
So been through minerstat and windows 10 OS…
With hand full of motherboard over the last few months…
only things that truly matter are listed below
4 g decoding = enabled
csm = disabled
all PCIe ports speeds are set to 2.0 or 1.0.

asrock settings that work for me are in pictures

For all testing of booting issues, I would use windows. once you can get windows to reconize your cards with bios settings, or at least past post boot then move on to other OSs.

Also Always plug your video connection to ever card. The display might be on one of the other cards; depending on your motherboard, lol.

[vikassonu]

i am also having same problem was trying to build a rig of 5 cards 3080 gigabyte was facing the same issue tried everything am using asrock steel legend after 2nd card trying to add 3rd one it says same error an its really hard to make last 2 work again have tried the 4g decoding also but didnt tried csm settings will try the same or else will have to move to windows hope that works for me

[iliyan.yotov]

Hey guys, I had the same issue using ASRock Z490 Phantom Gaming 4 with one 3060 and two 3070. Coudn’t get the second 3070 to be recognized in the device manager and even had problems booting in the first place.

The boot problem was solved by disabling fast boot, disabling CSM, DMI Link speed is set to Gen2, all PCI-E link speeds are set to Gen2, 4G Decoding is enabled. But this still didn’t resolve the problem with the third card not being recognised even with these settings, collocating more virtual memory, changing to multiple risers, trying different PSU etc.

The solution in my case was to add one more stick of RAM, initialy I had only 4GB (Corsair ValueRAM 2666), so I had a spare 4GB, and after adding it - everything works fine!!

[vikassonu]

Happy to hear that it worked for u an its really strange that adding ram can also resolve some issues but in mine case i have to change the processor i was previously using 3200g ryzen which was not allowing the 3rd card but now as i have changed the same to 2200g now its working with 4 cards … But now new kind of problem has arrived though 4 cards are working now but 5th one shows low power an doesnt work i dont know why it is doing so i am using 1 850 w psu 1 750 w for the same rig but still i dont know why it is showing less power consumption an not working but as i take the 5th card out it all works fine an even the 4th card is also showing the lesser power consumption … will try to change the PSU today
I am posting the pic of hive main screen see the first card is using or showing just 10W but its working … Strange!

[MiningNewb]

Appreciate the screenshots / settings. Unfortunately, I’m still stuck on 2 GPUs. I can’t get the OS (Windows 10) to boot with the 3rd one plugged in. I have 16GB ram so I don’t think that’s the issue. I copied your settings. Any other ideas to try? I’m kind of at a loss on what to do at this point. I tried multiple GPUs/riser combinations. Two will boot right up but the 3rd I just get black screened.

[MiningNewb]

Just realized every time I disable CSM it enables automatically. I googled and read I may have to reinstall windows to get it to stay disabled? Ugh.

[AIcrowser]

Great, good find.
I had that happen but still works with one card.
Updating bios firmware helped also.
Yours will not even post with csm enabled. What motherboard/process are you using?

[MiningNewb]

It will post with 2 GPUs and CSM enabled but not 3. I’m going to have to disable CSM and then reinstall Windows once I do is my understanding. Hopefully, that does the trick. Thanks for following up!

[MiningNewb]

So today was reinstall Windows project day and it was a huge fail. No matter what I do when I disable the CSM it automatically restarts and then turns itself back on even if I try to boot from USB to reinstall Windows. Any ideas on what I can try to fix that? Once again I’m stuck with 2 GPUs. The 3rd won’t boot at all with CSM enabled and disabling it is apparently impossible.

[AIcrowser]

What the hardware motherboard Cpu?
Are you at the latest firmware?

[MiningNewb]

I don’t understand your first question?

Next time I restart I will look at the firmware version. I’m not actually sure. It’s whatever came with it. I didn’t mess with it.

[AIcrowser]

Motherboard part number a cpu part number.
You Motherboard might not support more gpus
You should always install latest version of your bios firmware for your motherboard.

[MiningNewb]

Ah ok, thank you. It’s the ASROCK H470 Phantom Gaming 4 paired with an Intel Core i7-10700. The motherboard does support more GPUs. Perhaps it is the firmware version that’s out of date. I’ll get back to you on that.

[AIcrowser]

I would also check your power. If you have a hard crash due to power overload from to many cards or gpu overclock settings are to high this will reset your bios to default some time… So if you are hitting a limit could cause bios to reset configuration

[fmacedoo]

I believe the processor is responsible for managing the PCIe lanes. It may recognize your multiple GPUs, but it may freeze while mining.

I have an old i3 generation that sometimes stuck at GPU recog on boot, and sometimes recognize them properly but freeze after a time.

I’ve updated to a ryzen 5 1600 with another mobo. Along that new kit, I was able to plug 6 GPUs, but I still had an issue with the PCIe, see below…

• using 1 USB expander on PCIe 1st slot + 2 GPU on 2nd and 3rd PCIe slots cause GPU 5 and 6 to be not regocnized.
• using 2 USB expander on PCIe 1st and 2nd slots, the 1st with 4 GPUs and the 2nd with 2 more, worked fine.

At the old mobo I’ve mentioned neither these two configuration worked, freezed on both.

[Yalzaben]

After reading this thread, and trying every suggestion from @AIcrowser and @iliyan.yotov and the rest, I have come to the conclusion that it’s mainly the CPU. I have the i5-10400F and apparently its compatibility with this mobo doesn’t allow it to use all the pcie lanes for mining. The mobo did recognize all 5 gpus but was mining on only one gpu. Of course, switching 4G decoding off allows you to mine on a second gpu and that’s as far as it gets. Adding/Removing RAMs did not have any effect on the process whatsoever. I have the latest bios installed and that was of no help either. I’ll be trying to downgrade my bios tonight and if that doesn’t work I’ll test it on Windows and see if it works.

[DirtyHarry]

I had the same Issue. I have a new minerdude xtreme. this whole thing was very frustrating.

Eventually it came down to the miner shipped without a cmos battery.

The miner came with HiveOS installed. Hive wants GEN2 in the PCIE link speed - a change to the BIOS. Presumably when the miner was shipped or when hive was installed this setting was changed. However, with no battery you can change the BIOS all you want, but it will always revert to default when it boots (PCIE link speed auto, which meant GEN3).

I was also getting a ton of SSD errors when loading the AMD drivers.

So net to fix the issue, I bought a $2 battery, reimaged hive to the SSD with the hive-image function, and set PCIE link speed to GEN2.

I hope this helps someone else, cuz this took 2 me effin weeks ;-/

[danidanidani]

hi, G11, could you please share the bios settings of the mainboard tuf h470 pro?

[geoffpolo]

I bought 2 SoonTech 8xGPU mining rigs from Amazon and they will not work with 3 cards only. If you roll back to only two or drop in a 4th or more, you are good to go. Guys at SoonTech actually shared that with me when i encountered the issue. Could be helpful, so thought I would share.