help with memory upgrade

hello all im looking to upgrade or add more memory to my
hp envy 700-050
what i have now in there is
3rd gen intel core i7-3770 processor
8gb ddr3 system memory
1tb hard drive
i upgraded the video card to g force gtx 770
i would like to upgrade my memory and add more or the max i can have any advice help or product info will be good
thank u for your time