@Draxus, in your screenshot with GPU-Z things do appear to be functioning properly. Your low hash rate is caused by your settings (I get a similar hash rate with those settings on my 7950). Also, for some reason your memory clock is low and as stated by Spetznaaz, your voltages are higher than they need to be. In fact, I have the same card as you, a Sapphire 7950. Unfortunately, our cards have wayyyy overboard voltages of 1.225Vcore/1.6Vmem by default. Here are the settings that work for me right now:
I need to use both Sapphire Trixx and MSI Afterburner to tweak the card as only Trixx can adjust the core voltage and only Afterburner can adjust the memory voltage. Start Sapphire Trixx and adjust core voltage to 1080mV. Apply and close. Start MSI Afterburner, enable voltage controls and adjust memory voltage to 1500mV. Set the power limit to max (+20 --
this is very important!), the core clock to 984mhz and the memory clock to 1355mhz. If you like, setup a fan profile and enable automatic fan control as the default fan profile on this card seems very conservative. Apply your settings and minimize Afterburner to the system tray.
Create a batch file inside your cgminer directory and paste this into it:
setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -o stratum+tcp://yourpool:xxxx -u Username.Worker -p Password --intensity 19 --shaders 1792 --worksize 256 --thread-concurrency 24000 -g 1 --lookup-gap 2 --expiry=15 --queue=0
The setx command (if already set) and shaders option are both kind of redundant, but it doesn't hurt to have them. Don't forget to adjust the pool, user and password to your own.
Try that out and see if/how it works for you. This is the exact setup that I'm running to achieve 560Kh/s (I know this is lower than most people claim to achieve, but I'm using much fewer watts and my cards run cool). I tried using lower intensities and "-g 2" like my 7970s run, but I just couldn't get good results with such settings on the 7950.
I'm running the 13.3 beta driver on Windows 7 SP1. If you think your issues are caused by your drivers, trying a different version (or reinstalling your current version) may be a good option, as others have suggested. AMD not long ago released a driver cleanup tool. I've used it successfully to upgrade/downgrade between every version of the AMD drivers from 12.8 <-> 13.3. You can find it here:
http://sites.amd.com/us/game/downloads/Pages/catalyst-uninstall-utility.aspxIt may not be as good as reinstalling Windows, but it's much easier and therefore maybe worth a try.
Hopefully you'll get things sorted out, good luck!
