AOCLBF is a miner isnt it?
mining is working great with 4 cards installed. its only afterburner that wont run.
Yes it is. It was formerly called Phoenix Rising. I believe the reason he recommended that you try it is because it now has over/underclocking functionality built into the miner.
FWIW, I mine with a single 6870 and AB works fine (just as it does for you with 1, 2, or 3 cards). I don't overclock, but do underclock the memory to 300. AOCLBF is the miner I use, and it's an awesome miner, but I am unable to underclock the mem to 300 with it. I suggest you give it a try, it might work for you.