Has anyone had this problem?

[Merchlewitz]

So when i start the cgminer up 1 card accelerates faster then the other.. then when they top out one card seems to stay constant in this case GPU 0 and GPU 1 flucuates all the way from 690-780. I'll post a picture of it and my settings any help is appreciated these are 2 r9 280xs. Here are the settings I'm using: C:\Users\MerK\Desktop\cgminer\cgminer.exe --scrypt -u Merchlewitz.MerchlewitzLTC1 -p x -o stratum+tcp://us-east.multipool.us:3352 --gpu-platform 0 -d 0,1 -w 256 -v 1 -I 13,13 -g 2 -l 1 --thread-concurrency 8128  --gpu-memclock 1800,1800 --gpu-engine 1141,1141 --gpu-powertune 20 --no-submit-stale --auto-fan --failover-only -o stratum+tcp://us-west.multipool.us:3352 -u Merchlewitz.MerchlewitzLTC1 -p x

Thanks in advance!
http://imageshack.com/a/img541/4221/mac9.png

[Merchlewitz]

I would like to add i have another card in another machine a 6970 that's running pretty constant at 500MHs atm.. I can't seem to figure this out.

[oxfardk]

Neither
i don't have this problem with my config

[Merchlewitz]

I seems after a while the one of the cards tanks and does like 300 mhs... can anyone help with config settings or suggestions?

[Duane Vick]

You might need a dummy plug if windows is idling that second card. Is it the card that isnt connected to the monitor that is dropping down?

[AndrewGucci]

You do not need dummy plug almost 2 years
try to switch those cards, are they on risers? Try to switch risers, could be a PSU problem. What models of 280X you have ?