I have a machine that's running Windows 10, with 2 AMD R9 290s, and I'm trying to use geth with 2 instances of ethminer, one for each card. I've also set up port forwarding for port 30303, and geth is allowed through Windows Firewall.
The binaries for geth and ethminer were downloaded from build.ethdev.com.
Whenever I try running ethminer, the first instance always runs normally, but then the second immediately gives me this error: "DAG generation failure. Reason: Permission denied". So I've never been able to get both cards mining at the same time.
- reversing the order in which I start up each card
- using geth with --rpc, and alternatively, with --rpccorsdomain
- starting up the ethminers before geth
- running cmd as admininstrator (I imagine sudo might have worked if I had been using linux
Is there anything I can do to fix this? I'd appreciate any feedback.