Quote from: Faktorial on September 12, 2014, 02:45:04 PM

Hello,
I try to mine this coin , but all shares are rejected.
I have this 2x R9 280x-3GB , Ram 4 GB, OS W7-64bit, lates GPU drivers and using yac miner with config generated there http://ultracoin.net/configgen_raw.html
I try both config. and still only rejected share, NO HW eror.
I also mining UTC on this PC ,have no HW eror and rejected shares is low.
Can someone help help with this ?
I know my english is bad .. sorry for that , I am trying improve it Cheesy

A clean installation might help, especially if you have had your 750 ti's running on that computer. Nvidia drivers are notorious for system sabotage of AMD drivers.

I had all rejects until switching pools.

Another point that I have noted is that Sapphire Trixx will cause plenty of errors with Yacminer. I adjust as needed and then close before mining. I don't know if other overclocking programs have the same effect.