Quote from: tz on June 01, 2014, 08:06:54 PM

Best setup I could find for a 280x results in the following:

cgminer version 3.7.3 - Started: [2014-06-01 22:55:49] - [0 days 00:06:44]
[P]ool management [G]PU management [ S]ettings [D]isplay options [Q]uit
(5s):375.9M (avg):359.5Mh/s | A:5275 R:2189 HW:0 WU:80.7/m WUE:0.0%
ST: 1 SS: 0 NB: 15 LW: 263 GF: 0 RF: 0
Connected to flux-stratum.pool.mn diff 247 with stratum as user XXXXXXX
XXXXXXXXXX Diff: 603 Started: [23:02:16] Best share: 4.25K
--------------------------------------------------------------------------------
GPU 0: 67.0C 2715RPM | 368.4M/362.3Mh/s | R:29.3% HW:0 WU: 81.4/m T:1 I:10
--------------------------------------------------------------------------------
GPU 0: 369.1 / 361.8 Mh/s | A:73 R:5 HW:0 U:11.99/m I:10 xI:0 rI:0
68.0 C F: 90% (2719 RPM) E: 1100 MHz M: 1200 Mhz V: 1.200V A: 99% P: 20%
Last initialised: [2014-06-01 22:55:49]
Thread 0: 369.1 Mh/s Enabled ALIVE

here's the .conf for cgminer:

{
"pools" : [
   {
      "poolname" : "",
      "url" : "",
      "user" : "",
      "pass" : ""
   }
]
,

"intensity" : "10",
"vectors" : "1",
"worksize" : "256",
"kernel" : "keccak",
"keccak" : true,

"gpu-threads" : "1",
"gpu-engine" : "1100",
"gpu-fan" : "30-90",
"gpu-memclock" : "1200",
"gpu-memdiff" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "1.100",

"auto-fan" : true,
"temp-cutoff" : "95",
"temp-overheat" : "85",
"temp-target" : "65",
"temp-hysteresis" : "2",

"api-listen" : true,
"api-mcast-port" : "4028",
"api-port" : "4028",
"api-allow" : "W:127.0.0.1",

"failover-switch-delay" : "60",
"failover-only" : true,
"no-pool-disable" : true,
"no-submit-stale" : true,

"log" : "5",
"log-dateformat" : "0",

"queue" : "0",
"scan-time" : "1",
"expiry" : "10",
"hotplug" : "0",
"shares" : "0"
}

cgminer will not lower the vddc settings by itself. I do that externally using ASUS GPU Tweak. I own an ASUS R9 280x-dc2t.

Hope this helps. Good luck!

thanks!Your conf gave me 30 mh/s more per card!