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Title: [SOLVED] R9 280X Dropped from 710kh/s to 80kh/s Post by: Vyker on January 30, 2014, 04:01:19 PM Hello,
So this is a very strange one.. I have 6 GPU's all running fine for nearly a month hashing at 710kh. I had a windows update issue, and driver update etc. It caused some BSOD's etc and would fail after only a few hours. Once I had cleaned up the mess I had 5 cards drop to 80kh/s where they were once 710kh/s! That forced my hand to reformat, fresh Win8.1 Pro, drivers back to the way it was a month ago. When I went to start mining again, I suffered the issue again. 5 Cards @ 80kh and 1 card @ 710kh/s http://i.snag.gy/AapvC.jpg Has anyone suffered this? Any troubleshooting tips? Thanks Title: Re: R9 280X Dropped from 710kh/s to 80kh/s Post by: Vyker on January 30, 2014, 09:55:01 PM So I've since uncovered that the cards are throttled to 500mhz on the core and 150mhz on the memory.
Not sure why they've capped themselves. Anyone had this before? How can I bring them back to life? No overclocking app works. They're just stubbornly stuck at 500mhz Title: Re: R9 280X Dropped from 710kh/s to 80kh/s Post by: Explas on January 30, 2014, 10:35:02 PM So I've since uncovered that the cards are throttled to 500mhz on the core and 150mhz on the memory. Should be driver problem, I have this problem too, sometimes my ASUS DC2 card acts the same as yours..Not sure why they've capped themselves. Anyone had this before? How can I bring them back to life? No overclocking app works. They're just stubbornly stuck at 500mhz Title: Re: R9 280X Dropped from 710kh/s to 80kh/s Post by: sighle on January 30, 2014, 11:14:45 PM I had this problem as a result of a driver problem but it wasn't that simple.
I was getting driver crashes because of low quality PCIe risers with weak connections. If you get a driver crash as soon as your PC is booted, you need to start eliminating cards until it doesn't crash any more. Bad risers can cause boot/post/driver problems and are extremely hard to diagnose. Typically if you have recurring problems after successful/clean software installation you need to start looking at your hardware. Title: Re: R9 280X Dropped from 710kh/s to 80kh/s Post by: Vyker on January 31, 2014, 10:54:20 PM For that are interested.
The 500mhz cap [80kh/s] was removed when I plug a monitor into the cards. I only have to plug it in for a second or so before moving the DVI cable into the next card. This removed the 500mhz cap and it was back to full speed again. Once I have plugged into each of the 6 cards. I got back to 4.26mh/s :) I'm off to buy some resisters to build some homemade dummy plugs. Title: Re: R9 280X Dropped from 710kh/s to 80kh/s Post by: Wipeout2097 on January 31, 2014, 11:35:57 PM For that are interested. Perhaps you don't need them. Google "Disable ULPS"The 500mhz cap [80kh/s] was removed when I plug a monitor into the cards. I only have to plug it in for a second or so before moving the DVI cable into the next card. This removed the 500mhz cap and it was back to full speed again. Once I have plugged into each of the 6 cards. I got back to 4.26mh/s :) I'm off to buy some resisters to build some homemade dummy plugs. Title: Re: [SOLVED] R9 280X Dropped from 710kh/s to 80kh/s Post by: Vyker on February 01, 2014, 01:42:47 AM Based on quick learning of what that is, it makes sense to disable it.
I'll try in the morning and report back. Thanks |
