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Title: Driver crash? 1BTC Reward offered for solution [solved] Post by: asher2 on July 13, 2011, 06:56:23 PM Issue: guiminer crashes on start when 5 GPUs (6950s) are present. It works with 1-4.
Drivers have been swept and reinstalled. GPUs have been changed out. The GPUs don't matter, the slots they are plugged into don't matter, its just the number. The crash occurs with other polcbm miners and with phoenix. 1BTC reward offered to anyone who can resolve this for me. I'd like to get the 5th card working and add my 6th asap. Board is a 890FXA-GD70, cards are on x1 risers (3 are powered). All have been tested independently. Thanks all. Problem signature: Problem Event Name: BEX Application Name: guiminer.exe Application Version: 0.0.0.0 Application Timestamp: 4918019c Fault Module Name: aticaldd.dll Fault Module Version: 6.14.10.1417 Fault Module Timestamp: 4ddc6ce6 Exception Offset: 00014d4c Exception Code: c0000409 Exception Data: 00000000 OS Version: 6.1.7600.2.0.0.256.48 Locale ID: 3081 Additional Information 1: 60d4 Additional Information 2: 60d4b202377079ddc0cdb88488f5cf13 Additional Information 3: 02a3 Additional Information 4: 02a3ff522d141ac161ab19af6bc7b9ba Title: Re: Driver crash? 1BTC Reward offered for solution Post by: mike678 on July 13, 2011, 07:10:04 PM This might not be causing the problem but what power supply are you using? I looked up the watt usage for a 6950 and its 312 at full stress which x5 is 1,560 watts and that doesn't include the mobo hd ect.
Title: Re: Driver crash? 1BTC Reward offered for solution Post by: drawoc on July 13, 2011, 07:16:01 PM Also, what version of the Stream SDK are you using? I believe some of the older versions had a limit of 4 GPUs on Windows.
Title: Re: Driver crash? 1BTC Reward offered for solution Post by: asher2 on July 14, 2011, 02:46:20 AM This might not be causing the problem but what power supply are you using? I looked up the watt usage for a 6950 and its 312 at full stress which x5 is 1,560 watts and that doesn't include the mobo hd ect. Silverstone Strider Gold 1200W. I have plenty of headroom. Also, the miners crash when I try to start them when there is 0 load. Title: Re: Driver crash? 1BTC Reward offered for solution Post by: asher2 on July 14, 2011, 02:46:53 AM Also, what version of the Stream SDK are you using? I believe some of the older versions had a limit of 4 GPUs on Windows. I'm using the latest. Title: Re: Driver crash? 1BTC Reward offered for solution Post by: mike678 on July 14, 2011, 03:26:02 AM This might not be causing the problem but what power supply are you using? I looked up the watt usage for a 6950 and its 312 at full stress which x5 is 1,560 watts and that doesn't include the mobo hd ect. Silverstone Strider Gold 1200W. I have plenty of headroom. Also, the miners crash when I try to start them when there is 0 load. I'm kinda confused how do you plan to run 5 6950's off a 1200 w power supply if when they are mining each card runs at 312 watts? I may have that number wrong but I looked it up here: http://www.guru3d.com/article/radeon-6950-6970-review/11 Does it crash the moment you start mining with one card or when your mining with 4 cards and you begin mining the 5th? Title: Re: Driver crash? 1BTC Reward offered for solution Post by: bluefirecorp on July 14, 2011, 03:32:22 AM This might not be causing the problem but what power supply are you using? I looked up the watt usage for a 6950 and its 312 at full stress which x5 is 1,560 watts and that doesn't include the mobo hd ect. Silverstone Strider Gold 1200W. I have plenty of headroom. Also, the miners crash when I try to start them when there is 0 load. I'm kinda confused how do you plan to run 5 6950's off a 1200 w power supply if when they are mining each card runs at 312 watts? I may have that number wrong but I looked it up here: http://www.guru3d.com/article/radeon-6950-6970-review/11 Does it crash the moment you start mining with one card or when your mining with 4 cards and you begin mining the 5th? You do have that number wrong. 312 watts would be for that entire system. I believe a 6950 requires 2x 6 pin slots. Each 6 pins pulls 75 watts max. The motherboard may also pull another 15 watts per card. That's 165 watts PER card times 5 cards. 825 watts, say a 125 watt CPU and another 100 watts for other stuff (multiple hdds/whatever), still under 1200 limits. The problem does seem to be windows, have you tried in linux? I think LinuxCoin would be helpful in this situation (live, already ready for a test). ~bluefirecorp Title: Re: Driver crash? 1BTC Reward offered for solution Post by: FreeJAC on July 14, 2011, 04:44:16 AM There is a driver hotfix here not that it specifically deals with your issue.
http://support.amd.com/us/kbarticles/Pages/AMDCatalyst116bHotfix.aspx Title: Re: Driver crash? 1BTC Reward offered for solution Post by: sabe on July 14, 2011, 05:37:03 AM This might not be causing the problem but what power supply are you using? I looked up the watt usage for a 6950 and its 312 at full stress which x5 is 1,560 watts and that doesn't include the mobo hd ect. Silverstone Strider Gold 1200W. I have plenty of headroom. Also, the miners crash when I try to start them when there is 0 load. I'm kinda confused how do you plan to run 5 6950's off a 1200 w power supply if when they are mining each card runs at 312 watts? I may have that number wrong but I looked it up here: http://www.guru3d.com/article/radeon-6950-6970-review/11 Does it crash the moment you start mining with one card or when your mining with 4 cards and you begin mining the 5th? You do have that number wrong. 312 watts would be for that entire system. I believe a 6950 requires 2x 6 pin slots. Each 6 pins pulls 75 watts max. The motherboard may also pull another 15 watts per card. That's 165 watts PER card times 5 cards. 825 watts, say a 125 watt CPU and another 100 watts for other stuff (multiple hdds/whatever), still under 1200 limits. The problem does seem to be windows, have you tried in linux? I think LinuxCoin would be helpful in this situation (live, already ready for a test). ~bluefirecorp This is not entirely correct either. Each 6 pin can deliver much more than 75 watts (although 75 watts is the recommended maximum) and often does under high overclocks. But you are in saying that 5 cards would be easily handled by the PSU. I agree that you should test it with Linux (just run LinuxCoin) to be sure that its a software issue. Title: Re: Driver crash? 1BTC Reward offered for solution Post by: asher2 on July 14, 2011, 07:54:48 AM I've got it sorted now guys.
To the questions above about power usage... im pulling 1280 at the wall running 6x 6950 at 800/300. My PSU is approx 87% efficient at this load. I don't have a lot of headroom to OC unfortunately! Title: Re: Driver crash? 1BTC Reward offered for solution [solved] Post by: prophetx on May 20, 2013, 06:27:17 AM do u recall what the resolution was? i have the same issue on 6950s
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