Quote from: Spookymango on June 13, 2017, 04:39:23 AM

Hello I am having some issues using SimplMining OS for Ethereum. I Was wondering if someone could help me with my current situation.

Fail to start Windows/SimpleMiningOS with 4 RX 480's plugged in (but 3 work)

I'm powering the USB Risers

I can boot Windows and SimpleMiningOS with 3GPUs plugged in, but not 4. If I plug in a 4th GPU, SimpleMiningOS boots, but the screen stays black, and hitting any key reboots the machine. Windows won't boot at all.

I power each USB Riser using molex connectors hooked up to the PSU.

I've tried setting each PCI-E slot to Gen1 (and every other option: Auto and Gen 2/3), tried set the PCI PEG setting to disabled (and every other option), and tried enabling/disabling 4G decoding. In fact, I've tried setting every combination of the above, but to no avail.

I can boot into SimpleMiningOS with 3 cards plugged in to the 1x PCIE slots over powered usb risers, but can not boot with a 4th card. I tried plugging the 4th into both the final PCI-E 1x slot and either of the free PCIE 16x slots, it makes no difference.

All cards are stock. I haven't flashed them with any custom BIOS, and haven't tried over/under clocking them yet.

I know it's not a bad card/riser that's causing the issue, because I tried rotating cards/risers, and each of them work just fine as long as only 3 GPUs are installed when I boot up.

What else can I try to get 4 GPUs booting? Obviously I'd like to get all 6 working, but... baby steps.

Hi!

What kind of motherboard do you have?

1. check the motherboard BIOS updates - if there's a newer one, update it
2. 4G - always must be enabled if you want to use more than 3 cards

Because you turned on/off nearly everything, my proposal is to set the bios back to default, enable only 4G, disable the motherboard VGA and run the OS. I hope it'll help...