sgminer.bat

set GPU_MAX_ALLOC_PERCENT 100
set GPU_USE_SYNC_OBJECTS 1
sgminer

sgminer.conf
{
"pools" : [
 {
  "url" : "stratum+tcp://stratum.nicehash.com:3336",
  "user" : "mybtc",
  "pass" : "x"
 }
 
],
"intensity" : "19,19,19,19",
"xintensity" : "0,0,0,0",
"rawintensity" : "0,0,0,0",
"worksize" : "256,256,256,256",
"lookup-gap" : "2,2,2,2,2",
"thread-concurrency" : "30464,30464,30464,30464",
"shaders" : "0,0,0,0",
"gpu-threads" : "2,2,2,2",
"gpu-engine" : "975-1050,975-1050,975-1050,975-1050",
"gpu-fan" : "75-100,75-100,75-100,75-100",
"gpu-memclock" : "1250-1500,1250-1500,1250-1500,1250-1500",
"gpu-memdiff" : "0,0,0,0",
"gpu-powertune" : "20,20,20,20",
"gpu-vddc" : "0.000,0.000,0.000,0.000",
"temp-cutoff" : "95,95,95,95",
"temp-overheat" : "90,90,90,90",
"temp-target" : "85,85,85,85",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "5",
"failover-switch-delay" : "60",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"log" : "5",
"auto-fan" : true,
"auto-gpu" : true,
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "2",
"temp-hysteresis" : "3",
"verbose" : true,
"worktime" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

I have 4 r290, thank you for help.