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Author Topic: Overclocked cards getting lower share count than stock card ?  (Read 722 times)
airdata
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June 23, 2011, 01:40:27 PM
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My 2nd 3x5830 rig came online over the past week.  I followed the same steps to OC as I did on my other 3x5830 rig.  However, something happened after I flashed my 2nd card and i got a BSOD.  rebooted and 2 of the cards were flashed/OCd and the other was not.

Attempts to open winatiflash to flash the other card result in a blue screen, so ive just been running with the one card at stock speeds where it gets 235mh compared to the 285 of the other 2 cards.


However, last night I noticed something interesting.  I had rebooted the machine and started all miners at the same time.  After a short time, the card running at 235mh had generated about 55 shares with a few stale ones.  

The OCd cards were both around 40-45 shares with around 10% stale shares.  


Has anybody else run into a similar scenario?  If Im really getting more shares out of the card at stock speed I may just re flash all of my cards to their stock bios and run less MHps
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airdata
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June 23, 2011, 02:36:54 PM
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ok... maybe false alarm.

after idk.. 8-9 hours here are the current readings

GPU1 : 286.9Mh  1958 shares  368 stale/invalid
GPU2 : 286.2Mh  2297 shares  117 stale/invalid
GPU3 : 234.4Mh  1875 shares  65 stale/invalid

still not really liking the number of stale shares.
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June 23, 2011, 02:38:00 PM
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That implies the cards are not running stable so you either need to bump the voltage or lower the OC. There is a range where the cards won't hard crash but will in effect run slower and generate hardware errors, depending on the miner you use it may or may not report hardware errors.

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airdata
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June 23, 2011, 02:51:06 PM
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ah... with the OC, I did not touch voltage.  I just raised the clocks to 980 and memory to 350.

Guiminer was showing problem connecting to bitcoin rpc yesterday but has been fine since reboot.
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