What version of A10 are you running? Reading around, it looks like 1.0.0.9 has given people the best FPS. Here are some suggestions from other users. Hopefully they can help with your FPS problem.
I'd make sure your drivers are all up-to-date as well.
I usually hover around 35-40. My system is similar to the one you have. You may want to drop that # even lower and experiment with it.
Have you changed your curve or axis settings at all?
Try going here C:\DCS World\Bazar\Effects\expl\boom1.lua. Look for the line..NumParticles. I have changed that number from 400 to 100 and I've seen good results.
Many missiles, including the R-27 radar guided family lack INS.
Took ^ from the Western bias page that is now closed.. Couldn't grab the quote so I had to copy/paste... but you're confusing the shit outta me.
This is a game breaker for sure. Slow loading I'm sure he can deal with, though you shouldn't have too considering that it worked fine with the previous patch... I can't enjoy the sim either because of this, and I've purchased everything but FC3. It's disappointing to want to be a loyal customer but feel like you're getting crapped on because of issues that are present now that weren't in the past. I hope you can get it figured out to where you can fly.. As mentioned there are some threads that you may find useful.