Hello

I'm having some problems trying to mine UTC.

I have Radeon 280x, 7870, 6950 and 5870 cards and they all give hw errors.

Tried yacminer 3.5 and ultracoinminer from their site with different settings and all I get is errors while hash rate changes a bit.

yacminer.exe --scrypt-chacha  x --nfmin 4 --nfmax 30 --starttime 1388361600  -R 8000 -g 1 -w 128 --buffer-size 2656 --lookup-gap 3

ultracoinminer.exe --scrypt-jane --sj-nfmin 4 --sj-nfmax 30 --sj-time 1388361600 --lookup-gap 4 --thread-concurrency 8192 -g 1 -I 12 -w 128

Both of these give errors and changing the settings wont help. Does this require a specific catalyst version or am I missing something?
Thanks for all and any help.