How to get 16gb ram to work on my mobo

Ripemanew1

Honorable
Oct 16, 2013
20
0
10,510
Gateway FX6840-03e
Intel Core i7 860 2.8GHz (Runs at 3.4)
Asus Gtx 760 GPU (2gb)
8GB DDR3
1TB HDD
Windows 7 Home Premium 64-bit

I need more RAM for Photoshop and prefer to not spend the money upgrading to a new mobo/cpu setup just to get it if possible. Does anyone have a way for me to get my mobo to recognize 16 gigs of ram? If not any good suggestions for a cpu/mobo upgrade would be helpful.
Budget for cpu/mobo/ram is around $500 (no more than $650)
 

Ripemanew1

Honorable
Oct 16, 2013
20
0
10,510
Thanks everyone. I think I will wait til early next year to see what ddr4 is looking like and rebuild from there. If anyone else knows how I could improve the performance of PS on my rig in the mean time the help would be appreciated.