2GB of DDR3 is Abysmal. Even if most users won’t fill it with running applications, having as much RAM as possible on a NAS will serve to help file access times as any file requested is first searched for in RAM and if not found, is requested from the HDDs. Recently used files are kept in the RAM cache for future reads, increasing your valuable IOPS:
Taken from the Synology SSD Cache Whitepaper
Some users also say that disabling Synology’s Memory Compression can help the interface and general system be more responsive. With 8GB of RAM, you can turn off Memory Compression. So let’s get to it!
The first step is to snag a 8GB DDR3L compatible module, as Synology doesn’t post which are compatible with their units, I have throughly tested this module in my DS716+ and DS716+II with no issue: Crucial 8GB Single DDR3 1600 MT/s (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V Notebook Memory CT102464BF160B
Next, you’ll want to remove your disks from the DS716+ and place it laying down so you can see the module. Before sticking your hands in, be sure to touch something metal such as a PC case (which is grounded) to discharge any static electricity buildup. Then it’s as easy as fiddling with it to depress the side arms for the module to flip up, removing, inserting the new module, pushing in at an angle then pressing down to snap back into place.
After installing the module:
Boot up your unit, disable Memory Compression from “Hardware & Power” and enjoy your new speeds!
Keep the old module somewhere safe! The sticker claims “Warranty void if removed” however all one needs to do is to stick the original module back in for warranty service. There is no seal, glue or otherwise keeping the module in.
I have 2x new 256GB Samsung 850 Pro SSDs going in (For SSD Caching) along with a DX513 arriving today, stay tuned for benchmarks!