haven't found a way to mine with my older cards (two 5870 and one 5830) for neoscrypt efficiently...i think it is only a matter of time till someone tweaks the miner for older cards, currently i'm using it to mine cryptonote with claymore miner and these three cards fetch me 754h/s compared to a single 280x h/s of ~600h/s....i remember when claymore later added support for older cards, the same will happen to neoscrypt miners..
Have you tried the kernel modded for older cards yet?
If not, try this:
http://phoenixcoin.org/downloads/neoscrypt_vliw.clI'm using it for 5870's....42 kh/s each card...hopefully soon someone get's a kernel for us.
will try it.thanks.
that is very inefficient..my 7750 is at 70kh/s..5870 could double that of 7750 to about 140kh/s more..seen it double in other algo like scrpyt and cryptonote.
EDIT: it works thanks damm315er....hey lsss you should try other settings, mine is -i 11 -w 64 -g 1 (overclocked)

the ~100 kh/s is my 5830 and the 140 - 170 kh/s are my 5870's..don't know much about "WU" it is too high compared to my 280x but 0 HW which is good.
there is still the ..i'm still tweaking