Problem with Gui Miner, Hashrates drop considerably after a few minutes

[Ampersand.cv]

I've installed GUIMiner on 3 machines all pooling for deepbit, I'm using the latest GUIMiner, and using the tags -v -w 128 -f 60 when I mine,
but after being on for about 10 minutes the hashrate drops from about 45 MHash/s to about 600 kHash /s.  I have checked and disabled all of my
power saving settings (windows 7).  What am I doing wrong?

[John (John K.)]

I've installed GUIMiner on 3 machines all pooling for deepbit, I'm using the latest GUIMiner, and using the tags -v -w 128 -f 60 when I mine,
but after being on for about 10 minutes the hashrate drops from about 45 MHash/s to about 600 kHash /s.  I have checked and disabled all of my
power saving settings (windows 7).  What am I doing wrong?

What GPU? Also, try CGMiner too as GUIMiner is outdated.

[Ampersand.cv]

It's a GTX 550 Ti, and I have tried CG miner, though it was through the Guiminer interface

[m00min]

Did you ever fix this, I get the same behaviour with guiminer on deepbit and eclipse.... but slush and bitparking work fine....  odd

I'm wondering if a change to cgminer will do the trick?

[ilostcoins]

I had similar problem with guiminer. Haven't had a single instance of this problem since using cgminer or bfgminer. You just need to get used to the command line options.

[m00min]

Perfect thanks to the confirmation.. migration to cgminer on the cards then

[m00min]

Will leave it running and see what happens... extra 25Mh/s too just by changing to cgminer

[m00min]

Seems to be a gui miner issue, had no such problems using cgminer.  Stayed connected all last night when it would have dropped out within 30 minutes on gui miner.

Hope this helps somone,

m00