Hey Miners,
I have a rig with 3 cards ( Vega 64 ) running on Windows 10.
I can connect the 3 cards on the motherboard directly but I'll face a heating problem so I decided to take one card out and I connected it with a USB Riser.
It's works fine for couple of minutes ( sometime hours ) then the mining software stops and If I ran it again it doesn't mine so I have to restart my machine and when I do that Windows can't read the third card and it shows a yellow triangle with Error Code 43.
I changed the USB Riser and still the same problem, I tried to switch the cards and the slots and everything and the problem is always there.
I have ASUS Z270E with 4 GB Ram and I increased the Virtual Memory but still no luck.
Think you'll need more than 4GB ram installed - 8 or 16.
4gb is enough even for vega, @topic dont connect your riser with sata to molex.
Maybe, but I once had a horrible few weeks trying to build a stable Vega rig with 4gb.
Anyway, aside from that check power connections, especially the risers, and as treanski says avoid sata if possible. If not possible use one sata PSU output per riser max.