Hi, I desperately need help with my mining setup as im pulling my hair out here...

So I had a Rad 6950 that I was using for mining, got it working with no issues so I thought i'd build a dedicated mining rig.

So I bought:
Gigabyte GA-990FXA-UD7 Mobo
Thermaltake 1475w XT Gold PSU
and 3x Gigabyte Radeon R9 290X OC WindForce 4mb (GV-R929XOC-4GD)
16gb RAM
running on win7 x64

Got everything running with a little bit of tweaking and a guide that was very useful here
http://www.thecryptomaniac.com/2013/12/mining-with-radeon-r9-290x-how-to-get.html
But as described in that article, 930mh/s-- I was not getting anywhere near that, infact the best I could get was:
Card 1:- 72oC (display) 740kh/s
Card 2:- 84oC 810kh/s
Card 3:- 84oC 780kh/s
The only real difference was that I am using catalyst drivers 14.1 beta because when I used other drivers, my screen would have vertical coloured lines once I excited mining, i had to clean out the drivers and reinstall to remove the lines which dont reoccur with the 14.1 drivers.

I left it running for 24hrs and had no stability issues so I decided to try and tweak a few settings... BIG MISTAKE.

Now i cannot achieve anything over 500kh/s, i just get a multiple of random problems and its driving me mad because the logic behind it is nowhere to be found.  I cant even go back to my original settings because, i just tried it and the best i could get was around 300kh/s.  It gets worse every time i try something new.

I also have a problem with the gfx cards continuing to heat up once mining has stopped, even restarting the PC, leaving it off for a few minutes and then powering it up, the temp does not idle below 60-80oC when it was idling at 41oC when I first setup the system, there is no load on the cards so I do not understand that at all.

I'm wondering if multiple overclocking programs such as catalyst control centre, msi afterburner, gigabyte oc-guru are somehow causing problems?

My arguments in CGWatcher are:
--scrypt -o <pool> -u <user.worker> -p <pass> --gpu-platform 0 --worksize 256 --vectors 1 --intensity 20 --gpu-threads 1 --log 3 --thread-concurrency 33792 --lookup-gap 2 --api-port 4028 --expiry 120 --queue 1 --scan-time 60 --temp-hysteresis 3 --temp-cutoff 95 --temp-overheat 90 --temp-target 85 --gpu-powertune 20

Anybody got any ideas how I can fix these problems and get performance around 900kh/s per card like others have reported on here?

Thanks in advance.

I purchased one of these about a month ago and never got it close the hash rate being reported @
https://litecoin.info/Mining_hardware_comparison . There, with the same model #, shows a hash rate of 752 kh/s. The absolute
best I've been able to get from mine is 582 kh/s, though not stable. I thought maybe I had a bad card, and either way,
decided to add 3 more to the mix. Currently, they are all averaging around 535 kh/s. Not sure where I've went wrong here.
I've tried a lot of tweaking, changing nearly every variable. Below is the cgminer command line:

C:\cg\cgminer.exe --scrypt -o stratum+tcp://pool1.us.multipool.us:7777 -u username -p password --thread-concurrency 22400 -g
1 -I 13 -w 256 --auto-fan --gpu-fan 30-75 --temp-cutoff 90 --temp-overheat 85 --temp-target 72 --gpu-powertune 20 --expiry 1
--scan-time 1 --queue 0 --no-submit-stale

Hi everyone, been reading these forums for months, now its time to create an account because i want to post in a certain topic but your forum rules mean that I have to come here first and make a post so here it is.  Hopefully ive padded this enough now to unlock my ability to post in another thread, in 4hrs?