@primouno, please could you tell me what hashrate I should be getting for a 7950? Ballpark, I never mined UTC before but these seem (to me) like very low numbers.
R9 280x give around 4.4-4.5kh/s (with settings so that it run bullet proof without crashing and of course latest yacminer and 13.12 drivers, win7) and wild quess 7950 give less.
You need remember that all is in same boat. With r9 280x give easy 740-760kh/s with normal scrypt. And about half if look normal "scrypt N" (N = 2048))
UTC is not this. It is scrypt chacha and N value is today 14 ! (N=16384)
My
wild quess is that 9750 can give something around 3kh/s. Today if run 3kh/s it may give something like 25 UTC in 24h. (with today typical difficulty)
If get 2mBTC / 24h it is much more than what ever other coin with this same hardware. (but perhaps it give more if do not sell now! - mine and hold. UTC value is really low now)
But really I have experience only with r9 280x rigs (sapphire toxic) and Nvidia 750Ti's what also may give around 3kh/s with much much less power that radeon GPU's
yacminer is perhaps best today for ati radeon GPU's
If go more difficult coin as example YAC where Nvalue is 16 it is much morre difficult and hashrate drops lot of. But do not worry, all other miners with this coin is in same boat with same kind of hashing speed.