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July 11, 2016, 12:12:00 AM |
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@navydude,
I've also had difficulties similar to yours. I'm building up two rigs gradually, making sure each one works before adding more GPUS.
Both rigs: Asrock H81 BTC Pro mobo Powered risers from Mintcell - these have USB 3.0 data cables and SATA power cables Samsung EVO 850 SSD Windows 10 Pro 64-bit 8GB DDR3 RAM Claymore dual miner v 5.0 Catalyst 15.12
Rig 1: Intel G3260 CPU Rig 2: Intel Celeron G1840 CPU
Rig 1: 3 Sapphire R9 390 Rig 2: 2 Sapphire R9 390
I have spent about 3 days tediously testing and troubleshooting, because I've had many issues with getting all the GPUs running. Here are my conclusions:
1. If I change my board configuration in any significant way (e.g. adding PCIe risers) must flash the CMOS to get video again. 2. Then I must start with only 1 GPU with riser in PCIe slot 1. 2. I must boot the system, get it working, shut it down, then add the other GPUs. 3. If the system loses power (i.e. if I turn the PSU off, or change my plug from one outlet to another), then I have to start over with steps 1,2,3.
This process feels almost superstitious at this point, but this is how I've managed to fight and claw to get 2 GPUs in one rig, and 3 GPUs in the other rig working.
Not sure if the issue is with the Asrock boards or the risers, but it's been a PIA to get what I do have working.
I have not yet attempted any more GPUs in either rig.
Let me know whether anything I've said helps, or what you find out.
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