B450 Tomahawk problem

[XUR_TIP]

I've been trying to assemble a mining rig using this B450 Tomahawk Max II motherboard, this MOBO has five pcie slots and the problem is only four slots works no matter what I try, driver always crashes when miner is starting with 5th graphic card onboard, I've tried all risers and GPUs in a separate mobo they all work flawlessly, help.

[sxemini]

I've been trying to assemble a mining rig using this B450 Tomahawk Max II motherboard, this MOBO has five pcie slots and the problem is only four slots works no matter what I try, driver always crashes when miner is starting with 5th graphic card onboard, I've tried all risers and GPUs in a separate mobo they all work flawlessly, help.

What cards, which miner, OS? Above 4G is activated in bios

[5W-KILO]

I've been trying to assemble a mining rig using this B450 Tomahawk Max II motherboard, this MOBO has five pcie slots and the problem is only four slots works no matter what I try, driver always crashes when miner is starting with 5th graphic card onboard, I've tried all risers and GPUs in a separate mobo they all work flawlessly, help.

What cards, which miner, OS? Above 4G is activated in bios

@sxemini what if the motherboard doesn't have 4G switch in BIOS or not? I have a Chinese motherboard J&W H81P with 6 pcie slot that only works with 5 graphic cards when I insert 6th GPU the motherboard won't boot up but funny thing is I can't find this 4G encode with in BIOS.

[sxemini]

I've been trying to assemble a mining rig using this B450 Tomahawk Max II motherboard, this MOBO has five pcie slots and the problem is only four slots works no matter what I try, driver always crashes when miner is starting with 5th graphic card onboard, I've tried all risers and GPUs in a separate mobo they all work flawlessly, help.

What cards, which miner, OS? Above 4G is activated in bios

@sxemini what if the motherboard doesn't have 4G switch in BIOS or not? I have a Chinese motherboard J&W H81P with 6 pcie slot that only works with 5 graphic cards when I insert 6th GPU the motherboard won't boot up but funny thing is I can't find this 4G encode with in BIOS.

You have and old motherboard with H81 chipset - here you can´t find this option i think

[5W-KILO]

I've been trying to assemble a mining rig using this B450 Tomahawk Max II motherboard, this MOBO has five pcie slots and the problem is only four slots works no matter what I try, driver always crashes when miner is starting with 5th graphic card onboard, I've tried all risers and GPUs in a separate mobo they all work flawlessly, help.

What cards, which miner, OS? Above 4G is activated in bios

@sxemini what if the motherboard doesn't have 4G switch in BIOS or not? I have a Chinese motherboard J&W H81P with 6 pcie slot that only works with 5 graphic cards when I insert 6th GPU the motherboard won't boot up but funny thing is I can't find this 4G encode with in BIOS.

You have and old motherboard with H81 chipset - here you can´t find this option i think

Any way around this? I heard that CPU gen can also cause PCIe slots not to work the CPU in this motherboard is core i3 processor any help will be appreciated, thanks for replying at least.

[sxemini]

I've been trying to assemble a mining rig using this B450 Tomahawk Max II motherboard, this MOBO has five pcie slots and the problem is only four slots works no matter what I try, driver always crashes when miner is starting with 5th graphic card onboard, I've tried all risers and GPUs in a separate mobo they all work flawlessly, help.

What cards, which miner, OS? Above 4G is activated in bios

@sxemini what if the motherboard doesn't have 4G switch in BIOS or not? I have a Chinese motherboard J&W H81P with 6 pcie slot that only works with 5 graphic cards when I insert 6th GPU the motherboard won't boot up but funny thing is I can't find this 4G encode with in BIOS.

You have and old motherboard with H81 chipset - here you can´t find this option i think

Any way around this? I heard that CPU gen can also cause PCIe slots not to work the CPU in this motherboard is core i3 processor any help will be appreciated, thanks for replying at least.

CPU is not important, all Intel CPU have enough lanes for 6 cards. I have an old Asrock H81 BTC running with an celeron 1840 - works well.

Did always the same PCIe not working? Did you change the pcie slots? Are your running Linux or Windows.