[SOLVED] Asus Prime H370-A unable to start with 5 GPUs

[VorteXz]

Hello everyone
So I have this mining rig with multiple GPUs from nvidia :
2x 1660 TI
2x rtx 2060

So far, with 4 gpus everything worked perfectly
A few days ago I bought the fifth gpu, a rtx 3070
When I plugged it into rizer, powered it with the power source, the computer won't start anymore
At first I thought it could be something with the new GPU, but then I disconnected another GPU and left only 4 of them
It seems that It works with any 4 GPUs but when I connect the 5th GPU motherboard simply won't start anymore and I get this 2 screens:
First one completely blank with only one bar "_" blinking in left upper corner of screen

So I get this screen at first and then if I wait a few minutes I get a second one saying:

Reboot and Select proper boot device
Or insert boot media in selected boot device and press a key



If I unplug any of the GPUs and leave only 4 again, it will work normally.

I have also tried following solutions:
-updated bios to latest version
-activated 4g decoding
-primary display to CPU Graphics
-DMI MAX LINK SPEED changed to GEN1
-PCIEX16_1 link speed changed to gen1
-PCIE speed changed to gen1
-M2_1 configuration changed to PCIE


I tried all these settings from bios and nothing worked

Can anyone please help me?
I am out of options

 

[popatim]

Check your motherboards PCIE assignments. It sounds like you're hitting a limit that turns off your pcie ssd.

 

[VorteXz]

Check your motherboards PCIE assignments. It sounds like you're hitting a limit that turns off your pcie ssd.

Where can I find that ?
Can you please be a little more explicit ?
I am totally noob

 

[popatim]

Begin with your motherboards manual.

 

[VorteXz]

I tried every possible option from bios...nothing seems to work
I heard something about reinstalling windows and making a uefi partition
Could this be it?

 

[egda23]

Hint: as popatim said, Google for number of PCI express lanes and H370

 

[VorteXz]

I googled it...didn t find anything

 

[egda23]

It seems that you are not the only one with this problem

View: https://www.reddit.com/r/gpumining/comments/lw15el/asus_prime_h370a_cant_get_more_than_4_gpu/?ref=share&ref_source=embed&utm_content=title&utm_medium=post_embed&utm_name=f59fb0cc40da4b799d05064d80c58270&utm_source=embedly&utm_term=lw15el

 

[VorteXz]

Yeah
At least he can boot windows if he has the gpus connected
If i connect more than 4 gpus my motherboard won t boot anymore at all

 

[egda23]

Probably he has a CPU with more PCIe lanes

 

[VorteXz]

Probably he has a CPU with more PCIe lanes

So it could be the CPU that does not support all my 5 gpus ?

 

[egda23]

No idea of what cpu you and the other guy have

 

[VorteXz]

I have this CPU Procesor Intel Pentium® Coffee Lake G5400, 3.70Ghz, 4MB Socket LGA1151

 

[VorteXz]

Any new ideeas?
What can I try?