1.  I down loaded

Download latest version (Windows):
  guiminer-20121203.exe (self-extracting archive)

NP the programs seems to be working.

2.  My Video card is a XFX black edition 7970
MSI afterburner only allows me to modify Fan speed
AMD Catalyst seems to work fine.

I've tried various flags.
I believe I'm using phatk2.  I do not know for sure.
Nor do I know how to tell.

3.  The problem is my GUI miner seems to work fine for about 20 mins then goes from 500+Mhash down to Khash.  Yet once it drops I don't seem to be generating nothing.  Like the system is still running my miner but I have 0 GPU activity at that point.  If I cklick stop mining then start again everything is fine for another 20 mins.  Problem does not seem to be in my flags.  I think it's a program issue of some type. 

I have a very basic system other than the video card and 950W Power supply.
Running Windows 7

Can someone help me so I can get this figured out.  I have been all over the forum trying to find answers and I have been trying different flags for the last 2 day's.  However, same thing does not matter what flag I use I get the same results the miner continues but the GPU activity stops.

BTW If you send me a personal message I will be able to read it but not sure if I can respond because I may not have enough posts.

Thanks to anyone that will help.  BTW I don't have much but I can try to donate some amount of BC