ROF uses multithreading but it usually only loads three cores. But higher clock still helps. Atm hexacores don't give more performance but in future they might split up some of the threads.
Still no idea why AA is not owrking for you, maybe you set a manual override in your driver that the game is ignoring?
The SPAD can carry two bombs in a small internal compartment where it can also carry a camera. German single-seat fighters never carried bombs historically, and they rarely flew into enemy territory either so they had no need for this. This changed a bit in the last few months though.
Regarding servers, well most of them are nice. There is basically two things that are catered for, fast-paced relentless killing on "FastFood" where you can get killed in seconds after you spawned, but it is a great place to learn how to kill fast.
And then there are some servers that offer a bit of a persistent mission with lots of things to do for people, level and low-level bombing, intercept, high-altitude fighting etc. if you live in Europe Les Hellequins offers the best ping and is usually very full around prime time, if you live in the US or Australia/Asia Oceanic Wings or Syndicate might be better.
I can only recommend visiting the official forums if you have any more questions, people are very helpful there:
http://riseofflight.com/Forum/
Just login with your in-game account, no need to register.
edit: some italians are also working on a WW2OL-inspired online war that I am very much looking forward to.