Title: GuiMiner - scrypt 3 x 7950 help needed! Bounty :D Post by: unkunku on May 14, 2013, 03:07:59 PM Hello everyone :)
I've just setted up my Litecoin mining rig consisting of 3 x 7950 GPU's, all connected to the motherboard through 2st 16x and 1st 1x riser. Now to the problem, two cards are running absolutely fine. However one of the cards ( connected furthest away from mobo, if it makes any difference ), as soon as you press start on GuiMiner - scrypt for that card I get (avg):0.000h/s | Q:7 A:0 R:0 HW:0 E:0% U:0.0/m and then just shortly thereafter everything freezes for 1 sec and screen blinks and " amd drivers stopped responding and has recovered" pops up. The GPU which has the problem is connected via a 16x riser. The card is completely useless at this stage, I noticed that one can run the card on low settings for 7950 but then one gets insanely(!) low hashrate of around 50... My specs are Mobo: Gigabyte 990XA-UD3 rev 3.0 PSU: Corsair AX1200W RAM: 10GB CPU : Cheapest I could find. GPU: 3 x 7950 connected with risers. Afterburner not installed, MSI kombustor installed and running though Can't really understand why this is happening, started out when I upgraded from 2x 7950 to 3 x 7950. It's one of the old GPU's too that's messing, not the new one I added. I downgraded to drivers 12.8, still same problem ( had initially the latest ) Been stuck with this sh*t now for 2 hours. Will give a small bounty of 5 LTC, the solution should work when I go to 4 x 7950 too ( as I've planned with my rig ). Thanks in advance! Title: Re: GuiMiner - scrypt 3 x 7950 help needed! Bounty :D Post by: habsrock93 on May 14, 2013, 04:42:58 PM I had a similar problem when my O/c utility was running at the same time. Once I closed Afterburner the problem went away...you could also try and diff. pci slot
Title: Re: GuiMiner - scrypt 3 x 7950 help needed! Bounty :D Post by: habsrock93 on May 14, 2013, 04:45:13 PM On some mobo's you can't use all the 16x and the 1x at the same time, try shifting the pci x1 to a diff location..thats my best guess
Title: Re: GuiMiner - scrypt 3 x 7950 help needed! Bounty :D Post by: unkunku on May 14, 2013, 04:52:09 PM The GPU which has the problem is connected via a 16x riser, also yes I've also noticed some problems when running with afterburner. However here I haven't even installed afterburner, only MSI kombustor.
Added this info to the thread start Title: Re: GuiMiner - scrypt 3 x 7950 help needed! Bounty :D Post by: nickwen on May 15, 2013, 06:46:44 AM try this
cgminer --scrypt -o URL-u USER -p PASSWORD --thread-concurrency 23040 -w 256 --gpu-powertune 20 --lookup-gap 2 i 16 |