Ehm... I dont really see the problem from that video...
Based on a rather big and complex 1.7 modpack played on a not top of the line PC, and that you don't seem capable of optimizing it completely, that seems to run very smooth.
Those tiny fps drops every now and then(which I am still sure are caused by ram/pagefile issues) are an inbuilt flaw in MC that always surfaces when you push your hardware to the limits. You can smoothen them out by installing Optifine(standard version is recommended I think, Ultra will cause lots of trouble). But I still think you will want to look into if your problem is not that your computer is relying too much on the pagefile.
OK i am install optifine and FastCraft
There are improvements
But there is the same problem in the low fps after every few seconds
And there was lag when the break blocks and when to open the doors or open chests, such as in the server
But I am not in server, i am in Single Player
Do you advise me, I replaced the processor and the memory of the strongest that I have?
Then I'd assume this: - Lot's of machines, pipes, etc. running that actually lag the server.
Probably something you are totally unaware of, like something messed up...
Try creating a new world, and try to see if you are getting lag there aswell.
Could also be something totally unrelated to FTB... like this:
I had an issue a couple days back where my Firewall and Antivir ended up fighting each other, didn't notice it, besides the block+FPS lag in minecraft. Once I resolved that issue everything went back to normal.
I am Creating a new world There is no problems
and there is only the problems of the ancient world
Do you advise me, I replaced the processor and the memory of the strongest that I have?