DaZuru I had the same problem when I pushed mine over intensity 13 it would crash.  I solved the problem by putting in more RAM.  12GB works fine for me but 8GB wasn't enough.  I'm not sure why this is the case when others are getting away with far less.

phzi I flashed the STILT BIOS and am now getting 1013kH/s so thank you very much

Hi phzi

Thanks for your help the past couple of days, I've finally got my card stable and am ready to give the STILT bios a crack.  Can you please advise which link I need to download as there were several?  I have the Sapphire Tri-X OC 290X with bios version 015.042.000.000.000000 from GPU-Z.  The available BIOS were:

290X:

MBA_C6710101-100_K2_AGR_STILTMXT_V32.zip (DPM7 - 1.2375V)

MBA_C6710101-100_K2_AGR_STILTMXT_V36.zip (DPM7 - 1.2125V)

MBA_C6710101-100_K2_AGR_STILTMXT_V3A.zip (DPM7 - 1.1875V)

MBA_C6710101-100_K2_AGR_STILTMXT_V3E.zip (DPM7 - 1.1625V)

MBA_C6710101-100_K2_AGR_STILTMXT_V42.zip (DPM7 - 1.1375V)

MBA_C6710101-100_K2_AGR_STILTMXT_V46.zip (DPM7 - 1.1125V)

Thanks

Hi

I attempted to flash the STILT bios (MBA_C6710101-100_K2_AGR_STILTMXT_V46.zip (DPM7 - 1.1125V) and got a SubsystemsID's mismatch error?  What am I doing wrong?  I have the 290x Sapphire Tri-x OC

I still can't get my hash rate above 600

by the way, 1500 memclock I've already tried and it made the screen flicker a lot, is something wrong with  my card?

Ok I'll give it a try, can you give me an example of the command line I need to execute in my .bat file?  My temperate only gets to about 70 degrees C

GPU clock 1040,  memory clock 1300

Hi guys

Just bought a brand new Sapphire Tri-X OC R9290X.  I see that everyone is getting at least 850+ hashrates however I'm currently only sitting at 470kH/s.  What on Earth am I doing wrong?  I've even changed the motherboard, CPU, RAM, HDD and PSU to see if that would make a difference and nothing.  I'm running Catalyst 14.1 beta (also tried 13.12).  Using cgminer 2.11.4, also tried other versions as well as sgminer with no luck.  The batch file I'm executing is:
cgminer.exe --scrypt -o stratum+tcp://hk2.wemineltc.com:3336 -u username.1 -p x -I 19 -g 1 -w 256 --thread-concurrency 32765

I've many different variations from many different forums?  I'm started to think I've got a dud card here.  Can somebody help me out please as I'm only new to mining.
My PC is running Asus h81m-e M/B, i5-4670 CPU, 8GB 1333 RAM, 850W PSU (high quality).

Any ideas guys?  I seem to be the only one with this card getting such low hashrates out of the box.  The most I ever saw it get to was 690kH/s but for some reason I haven't been able to replicate this number.