i have a 16gb ddr4 3000mhz ram in single channel with i7 8700 and gtx 1080ti
i see low fps ins games also a lot of stuttering
am i suffering this because of running ram in single channel should i change to dual channel and how much increase will i get then?
You will see alot of difference with dual channel because with your specs now the single channel is holding back your performance so change the ram about and make it dual channel then you might not get shuttering and low fps.
still, it may not fix the stuttering, but dual channel is better, be sure to buy the ram in a set because those are guaranteed to work together. adding a stick--even with the same mfg and timings-- to what you have might work, but you have to be the tester because it might not.
make sure all your drivers are correct and up to date for the most part, sometimes you need to go back a version or two with GPU drivers to get one that won't stutter on your machine.