x11 mining troubleshooting - HW errors 0 shares 280x

[SBMiner]

Hello,
If anyone can help me I would be very thankful.

I'm running SGminer 4.1 with the following command:
sgminer.exe -k darkcoin -u x -p x -o stratum+tcp://stratum.hashhot.com:3378 --gpu-platform 0 -d 0,1,2,3,4,5 -w 256 -I 13 --lookup-gap 2 --thread-concurrency 8192,8192,8192,8192,8192,8192  --gpu-powertune -20,-20,-20,-20,-20,-20 --gpu-fan 100,100,100,100,100,100 --gpu-engine 1020,1020,1020,1020,1020,1020 --gpu-memclock 1500,1500,1500,1500,1500,1500

Each of the XFX-TDFD 280X gives ~2 Mhash/s, but I get many HW errors, 0 WU, so 0 accepted shares, and 0 rejects as well.
I'm basically mining nothing.

I tried changing and playing with all of the parameters in the miner. Intensity, TC, without gpu engine/mem speeds, -w, -g, etc.
So I believe there's something else other than mining parameters that is the problem.
I tired googling, and there were only 2 other people with the same problem and they couldn't solve it.

My setup:
6x XFX-TDFD R9 280X, undervolted (can undervolting be the cause?)
Asrock H81 Pro BTC
Win 8 64
Techpowerup 13.1 drivers
SGminer 4.1

Runs perfectly on Scrypt (4.2Mhash/s) and Scrypt-N (2Mhash/s.)

[jedimindtriks]

this is my conf file for 280x, undervolted to 0.943

"intensity" : "13",
"worksize" : "400",
"kernel" : "darkcoin",
"lookup-gap" : "2",
"thread-concurrency" : "8193",
"gpu-threads" : "2",
"gpu-engine" : "0-1040",
"api-mcast-port" : "4028",
"gpu-fan" : "0-50",
"api-port" : "4028",
"expiry" : "28",
"failover-switch-delay" : "60",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "7",
"tcp-keepalive" : "30",
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"

[SBMiner]

Doesn't work, no config I tried works.
Any ideas?

Still not able to mine X11.
:/

[SpeedDemon13]

I=18
w=128
tc=8192
gpu-threads=4

Those work for me with error on my 7970 @ 1.05~1.1 volts. I use around 1050~1150 for core and 1500 for mem.

[Amph]

i'm just using this, nothing else, even TC isn't needed

-g 2 -I 13 = 2150 MH/s, with some oc it is possibile to get 2250 MH/s

[gilad215]

Youre probably using the wrong kernel.

Download sph-sgminer http://cryptomining-blog.com/wp-content/files/sph-sgminer-latest-windows.zip

in the bat file write -k darkcoin

[hot_gpu]

Downgrade Catalyst before 14.5.

I had the same problem, I changed drivers and ready.