Plenty of time till we reach the 4GB Limit.
Don't worry about those things now + there would be other coins on the same algo that you could switch and still be profitable.

mr.vina :  
yeah...and may be somebody will actually "bite" the indian stick ..pardon me ...the bait...   just joking.

"This miner is free-to-use, however current developer fee is 1.0%.
It means the program mining 99 minutes for the user and 1 minute for developers"

What OC settings you have?  What GPUs?   What is your Power supply, etc.

As others said, please give some more details so we can give proper guidance. Everything else is lucky guess.

I would try do what ivakar  said. Go to BIOS and disable all that is not needed like :
audio board, usb3, serial port.  set to disable.  If you have onboard/integrated video disable that too.
the MB chipset is crappy. probably cant handled everything turned on + multiple GPUs
  This hopefully should free some resources.