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Title: 3x Radeon 6870 - Low hash rate. Post by: minerX on May 20, 2011, 05:26:06 AM Hey guys,
I've got 3 radeon 6870s installed. I'm running 11.5 with 2.4 SDK. One radeon has Mh/s at 280. But when I install all three, all three hash rates drops to 90 per. So total 180 MH/s. Anyone know whats going ? Title: Re: 3x Radeon 6870 - Low hash rate. Post by: ensign_lee on May 20, 2011, 05:27:27 AM Are you running them independently? Or are you trying to crossfire them?
Title: Re: 3x Radeon 6870 - Low hash rate. Post by: minerX on May 20, 2011, 05:42:03 AM They are independent. No crossfire.
Title: Re: 3x Radeon 6870 - Low hash rate. Post by: Basiley on May 20, 2011, 05:45:55 AM Hey guys, maybe power-saving feature of firmware/catalyst ?I've got 3 radeon 6870s installed. I'm running 11.5 with 2.4 SDK. One radeon has Mh/s at 280. But when I install all three, all three hash rates drops to 90 per. So total 180 MH/s. Anyone know whats going ? try to monitor/adjust cards clocks. 90MH/s is quite low. 6870's usually got 200MH/s or about[per/unit]. Title: Re: 3x Radeon 6870 - Low hash rate. Post by: minerX on May 20, 2011, 06:03:39 AM Hey guys, maybe power-saving feature of firmware/catalyst ?I've got 3 radeon 6870s installed. I'm running 11.5 with 2.4 SDK. One radeon has Mh/s at 280. But when I install all three, all three hash rates drops to 90 per. So total 180 MH/s. Anyone know whats going ? try to monitor/adjust cards clocks. 90MH/s is quite low. 6870's usually got 200MH/s or about[per/unit]. I'll uninstall drivers and reinstall. Might be a bug since I just swapped out a 6950. And I didn't see any power saving features in the catalyst. Title: Re: 3x Radeon 6870 - Low hash rate. Post by: Basiley on May 20, 2011, 06:51:06 AM you didn't "see" such features in Catalyst, cuz its unmanageable[eside editing bios or using 3rd-party software for GPU control].
try launch MSI Afterburner and check you GPU's clock. Title: Re: 3x Radeon 6870 - Low hash rate. Post by: minerX on May 20, 2011, 06:57:32 AM you didn't "see" such features in Catalyst, cuz its unmanageable[eside editing bios or using 3rd-party software for GPU control]. try launch MSI Afterburner and check you GPU's clock. You were right. Booted up MSI and noticed only 1 GPU was working. Then I realized I forgot to change device numbers when copy/pasting the startup file. Fail :( Title: Re: 3x Radeon 6870 - Low hash rate. Post by: Basiley on May 20, 2011, 07:29:27 AM happen :)
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