Significant mining power reduction on Radeon 5850.

[KBundy]

Greetings all,

Feels good to back in the best community of all time!  Just started mining again with my Asus-5850 gpu and have been running into a small problem that I figured may be a simple fix.

Using GuiMiner v2012-11-18 I start off by getting around 280 mhash/s with a modest overclock.  I'll come back to my computer after a while (sometimes 30 minutes, sometimes a couple hours) and the card utilization drops to practically nothing with about 250 k/hash per second?

I know it's not overheating and shutting itself off as the gpu is watercooled and runs at a sweet 25-27 degrees Celsius all times.  

Anyone know what might be going on here?

Thanks for taking a look!

-KBundy

*** UPDATE ***
Upon monitoring GUIMiner more closely, I have noticed that this problem appears to happen every 15-20 minutes or so?  Have to restart the miner continuously defeating the purpose of mining in the first place.  Help a brother out here?

*** UPDATE ***
Upon further monitoring, it looks like it decided to stop dedicating full resources after the block was solved and a new block was started?

[Remember remember the 5th of November]

Why not try with another miner?

[420]

too late, switch to litecoin

https://bitcointalk.org/index.php?topic=117221.0

[Gatorhex]

It can overheat with a waterbock because it's not blowing air over the capacitors like a fan.

I would try underclocking the memory and stock clock the GPU.