Help with installing more than 9 GPU's on an ASROC

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   I have a 13 slot H110 Pro BTC+ mother board that has been operating fine for the past couple weeks with 8 GPU's installed on it. 
I had intended to install 5 more GPU's on the motherboard but when I go from 8 GPU's to 9 and up; the hashing power on the additional card is halved and the system becomes very unstable. In cases where there were multiple cards above 8 installed, ethos would eventually freeze.

Has anyone had this issue in the past or know what my problem could be? The rig runs without issue at 8 cards but becomes completely unstable afterwards.
Let me know if any other info is needed.

My setup is as follows:
13 - MSI Radeaon RX580 Armor 8G OC (Biosed and running around 27 hash) 
ASROCK H110 Pro BTC+ (13 PCI Express Slots) 
Running Ethos Version 1.2.7 (Mining Ethereum) 
3 - Power supply's with AUX paralleling cables, all Thermaltake Toughpower Gold(2 X 1200W and 1 X 850w) 
8GB Ram 
PCI-E Powered Riser Adapter Card (16x to 1x Powered Riser Adapter Card / MOLEX to SATA Power Cable - GPU Riser Adapter)

The mother board is all being power off the 850W PSU with separate cables being run for the main ATXPWR1, ATX12V1, PCIE_PWR1, PCIE_PWR2 and SATA_POW1.

I have installed plastic isolators between the PCI riser cables to stop from shorting out and i have checked all the PCI slots and they function correctly just not when installing more than 8 GPU's.

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Smeeter Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Dec 2017 Location: Canada Status: Offline Points: 3	Post Options Post Reply Quote Smeeter Report Post Thanks(0) Quote Reply Topic: Help with installing more than 9 GPU's on an ASROC Posted: 30 Dec 2017 at 2:38pm
	I have a 13 slot H110 Pro BTC+ mother board that has been operating fine for the past couple weeks with 8 GPU's installed on it. I had intended to install 5 more GPU's on the motherboard but when I go from 8 GPU's to 9 and up; the hashing power on the additional card is halved and the system becomes very unstable. In cases where there were multiple cards above 8 installed, ethos would eventually freeze. Has anyone had this issue in the past or know what my problem could be? The rig runs without issue at 8 cards but becomes completely unstable afterwards. Let me know if any other info is needed. My setup is as follows: 13 - MSI Radeaon RX580 Armor 8G OC (Biosed and running around 27 hash) ASROCK H110 Pro BTC+ (13 PCI Express Slots) Running Ethos Version 1.2.7 (Mining Ethereum) 3 - Power supply's with AUX paralleling cables, all Thermaltake Toughpower Gold(2 X 1200W and 1 X 850w) 8GB Ram PCI-E Powered Riser Adapter Card (16x to 1x Powered Riser Adapter Card / MOLEX to SATA Power Cable - GPU Riser Adapter) The mother board is all being power off the 850W PSU with separate cables being run for the main ATXPWR1, ATX12V1, PCIE_PWR1, PCIE_PWR2 and SATA_POW1. I have installed plastic isolators between the PCI riser cables to stop from shorting out and i have checked all the PCI slots and they function correctly just not when installing more than 8 GPU's.

GutBucket Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Dec 2017 Status: Offline Points: 1	Post Options Post Reply Quote GutBucket Report Post Thanks(0) Quote Reply Posted: 30 Dec 2017 at 8:34pm
	I read somewhere else that this mobo only supports 8 GPUs of the same type with a Windows OS. You need to use Linux to get all 13 identical GPUs up or have 5 GPU of a different flavour. ie 5 AMD and 8 Nvidia