Uh, solo mining is off topic? I thought that was what the Apollo II was all about? And if 500GHs can hit a solo block, then it's possible for 9THs to hit a solo block. Now do you understand?
Um.....
Your post had nothing to do with the Futurebit Apollo II BTC or support of it which is what this entire thread is about.
Now maybe you understand why its
OFF TOPIC 
.