Quote from: jims2321 on April 19, 2021, 12:36:02 AM

Just and update on Nvidia GPU's and RebTech 8 gpu miner. I recently got in my second one, so I decide I would try to get the miner to work with my Nvidia 1080's and Titan XP. Initially if a GPU was attached, it would not boot or display any video. I was frustrated to say the least. So I started poking around in the BIOS and saw a parameter that I remember from way back could be problematical with Nvidia GPU's and how it maps Base Address Register (BAR). Normally its not an issue with enabling 64bit BAR as most PC's have more than 4GB of RAM. But since these boards mostly ship with 4GB that can be problematical as the board tries to map the memory above the 4GB memory boundary, just something it does. So I disabled it and suddenly when I plugged in my Nvidia GPU I had video output from the GPU.

So next thing was to fire up Hive OS and see if it saw my GPU and if it would mine.

https://i.imgur.com/y1QeVKq.png

On to adding more Nvidia GPU's and see if it would still boot and mine.

https://i.imgur.com/tmDFYSi.png

So here are the steps I did to get it running.

1. Boot the Rebtech without any gpu connect via pci po
2. When it boots to the device list, hit <ESC> key to enter the BIOS
3. In BIOS down arrow to Setup Utility (last line in the list) and hit enter key
4. The move to the Advanced Tab (right arrow one time)
5. Then down one line to PCI Express Configuration and hit enter
6. You will see 3 configurations on this screen. You want to disable 64bit Bar Support.
7. Press F10 to save hit enter and exit.
8. Power off your Rebtech, and connect your Nvidia GPU to pci port 1
9. Plug in your monitor to the Nvidia GPU, as you will no longer have video out from the miner board when a GPU is connected.
10. Power on, boot HiveOS and configure your rig.[/li][/list]

Just want to thank you for sharing this. I'm using the board with AMD cards rn, but will save this for later.