6GPU rig cant make it stable, help please

[Warlockmng]

Hello guys,

I'm setting up a RIG (mobo Asus Z270h gaming), 3x Sapphire RX480 Nitro 8GB + 1x Sapphire RX480 Nitro+ 8GB + 2 Sapphire RX470 NITRO+ 4GB.

When I connect 1x RX480 Nitro, I'm getting 28.8 with single mining but when I connect 2x RX480 Nitro, one is running at 27.1 and the other one 23.5, same problem when I connect 3x RX480 Nitro (1x 27.2 + 2x 24.5). Weird thing is that when I connect 1 card only (same with all cards) , I get 28.8. Those 3 cards have the same bios mod and samsung memory.

Also when I connect all 6 cards, I'm getting 24-25 mhs and only one 27.1.

Already tested with afterburner & changed the memory clock with claymore.

Could someone could help me with this?

Thanks in advance.

[EthereumPY]

1) update bios

2) 4g enable, vt-d enable

3) pci-ex speed change from AUTO to 1x

4) peg 1x

5) turn off onboard no required resources  ex. sound, leds etc

happy mining

[Warlockmng]

Hello EthereumPY,

Thanks for replying, I already did all those modifications. Do you use GEN2 for PCI and PCIe?

Thanks again, regards.

[h311m4n]

Hello guys,

I'm setting up a RIG (mobo Asus Z270h gaming), 3x Sapphire RX480 Nitro 8GB + 1x Sapphire RX480 Nitro+ 8GB + 2 Sapphire RX470 NITRO+ 4GB.

When I connect 1x RX480 Nitro, I'm getting 28.8 with single mining but when I connect 2x RX480 Nitro, one is running at 27.1 and the other one 23.5, same problem when I connect 3x RX480 Nitro (1x 27.2 + 2x 24.5). Weird thing is that when I connect 1 card only (same with all cards) , I get 28.8. Those 3 cards have the same bios mod and samsung memory.

Also when I connect all 6 cards, I'm getting 24-25 mhs and only one 27.1.

Already tested with afterburner & changed the memory clock with claymore.

Could someone could help me with this?

Thanks in advance.

What OS?

Have you tried DDU to remove drivers and re-install?

[Warlockmng]

What OS?

Have you tried DDU to remove drivers and re-install?

WIN10, yes I already removed (DDU) and reinstalled the drivers.

[EthereumPY]

Hello EthereumPY,

Thanks for replying, I already did all those modifications. Do you use GEN2 for PCI and PCIe?

Thanks again, regards.

gen 1

[Warlockmng]

it was impossible to get all GPUs working at the same speed so I moved to Simplemining, now I'm getting 28.8 (4 cards) + 27.9 (2 cards).

Will continue testing with windows next weekend.

Thanks to all