Hello everyone!

Im new in to the mining of BTC. I started 3 days ago, my Mhash was good at 800/850Mhash/s. But today in BTC Guild Dashboard sudenly droped to 400Mhas/s and keeps going down...
I checked in the GUIMiner and it says 825/830Mhash/s... Temps are 60°C and 57°C of each VGA...

Someone can help me to figure out what is the problem?


Thanks a lot in advance!