[SOLVED] 3rd/4th GPU not recgonized. Is it the PCI riser?

[Umuzo]

Hey guys,

i am desperately trying to get my 3rd and 4th GPU running without success. Can someone experienced have a look at my setup please?

Mobo: http://www.asrock.com/MB/AMD/B450 Pro4/
GPU: 2x RTX 3060 Ti, 2x RTX 3070
CPU: Ryzen 3 2200 G
PSU: 850 EVGA G3 SuperNova
Current PCI-Riser: I am temporarily using those and have 2 of them: https://www.amazon.de/gp/product/B01MZF8FJA/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Upcoming PCI-Riser: I have ordered this risers (higher version) but it still takes time till they arrive: https://www.ebay.de/itm/6-24-Stück-VER009S-PCI-E-Riser-Karte-1x-bis-16x-USB3-0-Datenkabel-Bitcoin-Mining/333893530022?ssPageName=STRK%3AMEBIDX%3AIT&var=542955835594&_trksid=p2057872.m2749.l2648

Facts I could gather so far:

• I can run both 3060 in both PCIe 16. Same for 3070. I can also run 1x 3060 and 1x 3070 at same time
• When ever I plug a GPU to one of the PCIe 1 slots there is no signal to my monitor. Even not from the other both which are plugged in to PCIe 16.
• I tried every single PCIe 1 slot. And I tried both of the current PCI risers I have (see above)

I guess it is somehow related to the PCI riser? Do you think the new PCI risers will solve this issue?
According this page my mobo is suitable for mining: https://cryptoage.com/en/1750-motherboards-for-assembling-gpu-mining-rigs-in-2019.html

 

[dukocukk]

I have the EXACT same problem with the exact same mobo, its insane. I can manage to connect my two RX580's with the same risers as yours. But when i plug the third, pc just wont start. I dont think the problem is with pci risers or slots. I think the problem is with BIOS settings but i couldn't figure it out at all. Hope someone could help us.

 

[Umuzo]

Someone in reddit gave me the hint to disable CSM in BIOS. That was the solution This forced me to reinstall Win10 though.

Hopefully this also solves your problem. Good luck bro.