I'm having problems with my 5x R9 270X rig too.
Getting lots of rejects, 23% according to the 5 min. average, and also the combined accepted + rejected MH/s are significantly lower than what CGWatcher is reporting.
I'm using the recommended version of SGMiner.
Here's my config file
{
"pools" : [
{
"name" : "NiceHash-X11",
"url" : "stratum+tcp://stratum.nicehash.com:3336",
"user" : "17x2du9tLNyyb96sY56fE4nDZ5hWFtwMJM",
"pass" : "d=0.04",
"pool-priority" : "0"
},
{
"name" : "DarkCoin.miningpoolhub.com",
"url" : "stratum+tcp://us-east1.darkcoin.miningpoolhub.com:20465",
"user" : "miner69er.1",
"pass" : "x",
"pool-priority" : "1"
}
],
"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"gpu-engine" : "1150",
"gpu-memclock" : "1425",
"intensity" : "20",
"worksize" : "256",
"thread-concurrency" : "15232",
"lookup-gap" : "2",
"log" : "15",
"failover-only" : "true",
"sharelog" : "50",
"kernel" : "darkcoin"
}
it's generating a lot of messages such as "Stratum from Pool 0 requested work restart"
Any ideas what might be wrong?