Synology DS716+ and DS716+II 8GB Memory Upgrade

In Computing, NAS by Ross Fisher82 Comments

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:

Screen Shot 2015-12-31 at 9.07.35 AM

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!


  1. I didn’t think DSM 5.2 supported more than 4 GB of ram, and we would have to wait until the release of DSM 6 for support of >4 GB. How does this work?

    1. Author

      Works just fine as per the screenshot of my DS716+ unit. It can see and use all of the 8GB of RAM with DSM 5.2 Update 2.

      This may be dependent upon if your NAS has a x64 processor as x86 would be limited to 4GB. The DS716+ has x64!

  2. Hi man! Thank you for a great tutorial and article, do you think it’ll work for my DS713+ as well? 🙂
    It runs a Intel® Atom™ Processor D2700 x64
    Happy new year,

    1. Author

      While I haven’t checked myself, check both via ssh: /etc/synoinfo.conf and /etc.defaults/synoinfo.conf
      It’ll have a line:
      Mine is mem_max_mb=”8192″

      You may be able to hack this file to enable the full 8192 support as you have a x64 CPU!

      1. Alright! Mine were set to 1024, but I’ve read about people trying out this stick from Hynix with success( , so I think i’ll go for that one, as I got it for as little as 21.30$ with shipping on Ebay, and I don’t really think I’ll need more for my use. Btw, off the topic question, how would you rate a synology NAS as a mail/file/backup server for a small business(10-15 users)? And what other options should I consider? I know this is a very open question, but I’m about to set up at server for my dads company and it really seems like a user-friendly solution and inexpensive. (even though this isn’t the main concern)

        1. Author

          The should work as it’s 1.5v. The newer ones need 1.35v (DDR3L), such as the one in this post as it does both 1.35/1.5v. What a good deal!

          For SMB use, Synology or Qnap will be your best bet. You could build a Freenas or Rockstor box for cheaper but you’ll need someone to manage it as it’s a bit more advanced to administer and there is no support phone number to call for help. I’d look for a 4 core x86 – x64 (not ARM) box with dual Gigabit ports. The DS716+ is a great fit if you wanted to smart small and scale up with external expansion units. I hear the new Qnap 4 bays are also decent and cheaper per bay – but I haven’t ran one myself so do some research.

          So the laundry list is a quad core Intel (not ARM) CPU, 2x 1Gigabit ports (for Load Balancing or LACP), a gigabit switch (managed if possible for LACP if you are going to be backing up to another NAS or doing heavy read/writes) and good drives. I personally recommend the WD Red NAS Pro drives, they have a 5 year warranty for only a few bucks more. Seagate Enterprise drives I hear are also good, just aim for 5 yr warranty. Of course, BACKUP BACKUP BACKUP! RAID is not a backup! Have a nightly external backup and also an offsite backup like Amazon Glacier if you value the data.

          You could do a modern Dual core, but as you mentioned mail server, a bit of investment now will help future proof as you add employees or add services to the NAS.

          It all boils down to how much time you want to spend administering it, I had my own dilemma over this and wrote a post about it, check it out:


          1. Alright!
            Thank you so much for your extensive answer.

            I will have to dive into some deep reads when the time comes, and I’ll definitely take a look at you articles when I’m not as tired as now, you’ve been a great help, I appreciate it immensely.

            All the best,

  3. Thanks! I’ll have to give that a try for $32! So cheap for such an improvement.

  4. I have tried this upgrade with the same Crucial memory. But it caused the fan to run at a noisy full speed all of the time. Now back to 2Gb and the fan is back to normal speeds…

  5. Ross, did you experience this? What would cause the fan to run more with more memory?

    1. Author

      I did not, it’s running quiet as it ever has. Is there any difference between cool and quiet options? Are you using ddr3l 1.35v? Are you on Dsm 5.2 update 2?

        1. Author

          DDR3L. The Crucial module linked will work as DDR3L is nothing more than DDR3 @ 1.35v. To be clear, you need a DDR3 1.35v module for the DS716+

  6. Hi
    Just done mine i don’t have any issues with fan.Straight away notice speed improvement.I just don’t understand why they put only 2gb of ram?

    1. Author

      I hear you there! Likely to get you to buy the next model as with ram prices so cheap, they aren’t doing it to save money

      1. Author

        DDR3L. The Crucial module linked will work as DDR3L is nothing more than DDR3 @ 1.35v. To be clear, you need a DDR3 1.35v module for the DS716+

  7. Hi

    Thanks for doing this review as I wasn’t sure if 716+ supported 8GB in it’s one memory slot, and if DSM supported it – now I know!

    The Intel support site for the CPU [N3150] indicates max of 8GB & 2 channels [slots] but not if in one slot

    The ‘Link’ against the Datasheet’ brings up a pdf where section 7.2 ‘System Memory Technology Supported’ indicate 8GB in one rank

    A couple of queries

    1) Any reason you got CL11 memory – is this what the existing 2GB DIMM was? Amazon has the faster CL9 for ~$10 more – will it work?

    2) Was it easy to remove/insert the memory? How tricky does the metal bar above memory slot make it?



    1. Author

      Hey Mark! Another nifty way to check maximum supported memory of each Synology model is to check the /etc/synoinfo.conf maxmemory line. There are some out there with 2GB max defined in the file but more supported via the chipset so it’s unclear if the config file can be modified to unofficially support more RAM.

      1) I chose replacement RAM based upon the highest rated, with Prime shipping and cheapest module available on Amazon. RAM timings typically don’t relate to real world performance in most benchmarking so I wasn’t too anal about choosing CL9. As would the CL9 module work, I don’t know as I’ve never tested. Technically the chipset supports DDR3 1.35v up to 1600Mhz so CL timings shouldn’t impact compatibility.

      2) Not too bad, I sprung the arms and the module flipped up. I used my two index fingers to move it rear then out. Putting the new module in was a bit tricker but doable, just be sure the module is fully inserted before clicking it in. Working in a small ITX case to build a gaming rig would be more difficult for comparison.

  8. Hi. One more here with the new 716+, since one week ago. Previously with the 211j, so the performance is abysmal. I want to buy this memory recommended here. My question is that, Amazon Spain has two CT102464BF160B modules: ones identical with your photo, the other with the European Crucial website. I do not understand much about it, hence my question.
    Crucial & Amazon: &
    Amazon & your:

    BTW, thank you very much for the information of this web. I just found this web because I need information about how to install Plex Server on 716+, so double thanks.

    1. Author

      Any of those listed should work, most critically: DDR3 1.35v Dual voltage 1.35v/1.5v is okay as well!

      Thanks for the good feedback!

  9. Thank you for the great tip and instructions. It works perfectly on my DS-716+; from 2GB to 8GB w/no compression is a win-win!

  10. Yes after following your instructions to the letter have mine running with 8Gb now been running a month ,fan what fan!! its as quite as a mouse. Thanks for the info its great when people like yourself take the time and effort to spread the word

    1. Author

      Hey John, thanks for the kind words! I’m happy the upgrade went smoothly for you! Although I’ve switched back over to a DIY build with Rockstor, I miss my Syno and may pick another one up!

    1. Author

      Heyo yeled, thanks for the comment! May you enjoy your DS716+ for years to come!

  11. hi Ross, thanks for this great article and explanation. bought the same memory as you recommended from Amazon (€30 on which is much cheaper than the £28 on and the replacement was done in a blink.

    only the screenshot under the line “Boot up your unit, disable Memory Compression from “Hardware & Power” and enjoy your new speeds!” seems to be incorrected, that one is related to SSD caching. 🙂

    regards Eddict

    1. Author

      Howdy Eddict!

      I appreciate your kind words, I’m glad the memory upgrade went smoothly for you!

      As for the image, I did a redesign and redeployment back to a $5/mo VPS. WordPress has a nasty habit if not importing images properly so manual work has to be done. I really appreciate you pointing it out, I fix it 🙂

      Enjoy your Diskstation!

  12. Hey, Im switching from 215j to 716+, this is a great thing to know.
    What about changing fans? I hear they get pretty nasty while transcoding or doing heavy lifting. Did you ever think of changing stocks with some Noctua A8-flx for example?

    1. Author

      Howdy mi3x,

      I think you’ll be pleasantly surprised with the upgrade, going from a Dual to a Quad Core CPU can bring some more possibilities for sure!

      About the fans, I had the DS716+ and the DX513 5 bay expansion unit (2x additional fans but never ran due to only 2x 6TB HDDs, I put my SSDs in the DS716+ for caching – but someone should really should mix a caching SSD in the main unit and one in the Expansion bay so if it disconnects you don’t loose data) and I put it right next to me on my shelf to the left. I have to agree, it isn’t the quietest thing around even in “Quiet” mode when under load. The 6TB WD Red Pro drives themselves can be rather noisy but they are Enterprise level drives after all.

      I really like Noctua fans and I’d say go for it! I would just personally monitor the Syno’s heat level for a few days while under heavy load and leave it on “Cool” mode if possible (compare with stock, I don’t think Syno publishes their cooling specs). I’m just not sure what the CFM is for the stock fans but I do know that keeping your CPU and Drives from burning up will extend their lives 🙂

  13. Has anyone attempted to modify the /synoinfo.conf file yet? I would be seriously interested if that worked.

    Also, is there any reason I can’t use unbuffered ECC ram for this? I noticed that you suggested ram typically used in standard notebooks, but Kingston makes an 8GB SODIMM (1.35v) unbuffered ECC stick specifically for server applications.

    1. Author

      Howdy! I’ve modified the synoinfo.conf myself to enable Skip Sequential IO and it’s worked wonders, as for additional RAM support – that should be up to the chipset used.

      I can understand wanting to use ECC RAM in the Syno and honestly I’m not sure if it’ll work. Logic states that as BTRFS and EXT4 is not ZFS, there wouldn’t be much benefit in terms of preventing against data corruption as EXT4 doesn’t have checksumming and BTRFS is known as pretty reliable. What I do know though is that you can’t willy nilly dump ECC RAM into any desktop class motherboard, server boards only and since the Syno doesn’t come with ECC – I doubt it’s supported.

      Long story short, if you are that concerned about data integrity to seek out ECC to prevent silent data corruption, I’d recommend a custom built FreeNAS box with ZFS as it’s designed for extreme data protection!

  14. You might run into problems using Noctua fans, in my experience they tend to require more startup voltage than others. I’m not sure about the A8-FLX, but something too consider.

    I ran into this issue during my last build, but I was using the NF-F12 and NF-F14 IndustrialPPC fans.

  15. Great write up .. I was debating buying the QNAP equivalent over the Synology 716+ because of the higher ram in it. However with this hack the Synology is a no brainer. Took me under 5 minutes to replace out the RAM. Thanks!

  16. Hi,

    thanks for the blog post. Question: would it be possible to upgrade to 16 gigs? Only one module can be used, right?

    Would this one work?
    Crucial SO-DIMM 16GB, DDR3L-1600, CL11 (CT204864BF160B)

  17. Hi there Ross. Just ordered one DS716+ and one Crucial 8GB dimm like yours. Can’t wait to get my hands on it 🙂

    I have a question for you. When I receive it, can I immediately install the 8GB of memory and then install the DSM? Or it is recommended to install DSM with the official 2GB memory and after all is installed swap the memory?!


    1. Author


      Feel free to swap it immediately, it won’t hurt anything! Congratulations on the new DS716!

  18. I have tried this upgrade with the same Crucial memory (Crucial 8GB Single DDR3 1600 MT/s (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V CT102464BF160B). But it caused the fan to run at a noisy full speed all of the time. How to fix it?

  19. Help needed!
    I have tried this upgrade with the same Crucial memory (Crucial 8GB Single DDR3L 1600 MT/s (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V CT102464BF160B).
    But it caused the fan to run at a noisy full speed all of the time.
    How to fix it?

  20. Yesterday Synology upgrade NAS software from version DSM 5.2 to DSM 6.0.
    The problem was solved with a fan, it works correctly.
    It’s a god news to DS716+ users!

    1. Sorry, but it’s not work correctly! After reboot fun now working with full speed! 🙁 Help…..

  21. I bought a new Synology DS716+ and immediately purchased the Crucial 8GB module recommended in this post. I also installed this module immediately, without first switching the Synology on. I can confirm that works flawlessly. The Synology would not come up though after a reboot: blue light flashing, nothing happening. I fiddle around with this a little, pressed the ‘C’ button numerous times, held it pressed for 10 seconds etc. I did not get it to work then, and did not have much time to spare to spend on it. So I switched back to the 2GB module, where I also had issues after the first reboot. But for some reason I got that to work pretty quickly.

    This morning I took the time to give the 8GB module another try. Same behavior as before: I replaced the module, and the Synology came up no issue – also reporting correctly 8GB of RAM. After a reboot: blink light, nothing happening. I know more or less figured out what was needed in my case to get it to boot again. I basically took of the power by unplugging the device. When I put power on it again, I waited for a minute – nothing happening again. Then I kept the power button pressed for 10 seconds until the machine powered down. After this: no issues anymore, next cycle the machine powered up again and I can happily reboot from the DSM console. All works the way it should.

    A bit weird if you ask me, and it may be an error in my specific model or something – but I thought I’d share it for others to benefit from.

    1. As an update to my earlier post above: turns out the memory was faulty. It would run, but not well. I’d get memory errors, but only after 48 hours or so. So the memory bank was not dead on arrival, but not 100% still. I replaced it in the meantime by a new one. There the procedure was flawless, the Synology would boot immediately after replacing the memory bank and it’s been running stable every since.

      No real speed gains to report here I must say, but then again I do not have too many applications active. Performance was already limited by my network connection, read/write both top out at 109 MB/s which pretty much means my gigabit connection is full. I did add a USB SSD drive to use as ‘scratch’. NZBGet places its temporary files there. Previously download speed would drop to about 5 MB/s when unpacking, now it stays flat at around 12MB/s also when upacking.

      1. Author

        Not bad! It can vary depending on the workload. Sequential writes are usually capped by your disk speeds and network connection. You may see more benefit if you begin pushing small files + Random Reads as more data can be cached in RAM. If network speed is important to you, I highly recommended a managed switch with LACP. Even if you don’t run end to end bonding between your workstation to the unit, I did see gains in certain situations such as 1x 1Gb/s client via Ethernet + 1x Wifi client on 802.11AC.

        Have you disabled memory compression? It should give you some small performance gains as the CPU won’t have to compress/decompress to/from RAM when doing things in the UI for example.

    1. Author

      Thank you for your feedback SM! I went ahead and updated the article for series II support!

  22. Plugged in 8 MB in two days ago. The gain in speed is tremendous. Fabulous!

    1. Author

      Awesome! I’m so glad you have had real-world gains from the upgrade! Thank you for sharing your experiences 🙂

  23. Thanks for showing us the way on this! I now have 8GB on my DS716+ and am thrilled at how easy it was. So cool to have a super powerful server the size of a dictionary that pulls barely any power and is dead silent 🙂

  24. Even here in Denmark I had no trouble getting the exact type of memory that you recommended, the upgrader was fast and painless. Works like a charm on my DS716+ 🙂 Keep up the good work!

  25. hello friend Ross Fisher, greetings from colombia. thanks for update. waiting my machinne DS716+II. I tell you when i get.

  26. I tried upgrading my memory (DS716+ II), first time with another brand (same specs, only CL9 instead of CL11) and i only got the blue flashing light. Thinking it was the memory module that wasn’t supported, i sent it back and bought the crucial one. Still, no dice. Blinking blue light. The original 2 Gb module works fine, but I get the blue flashing light until approximately one minute passes, ans then it boots up just fine. Any idea what’s wrong? Is it the nas directly?

  27. I’m also running into the blue flashing startup problems when I’m swaping the stock 2Gb for an 8Gb crucial exactly specced like Ross (CT102464BF160B). When I put back in the 2Gb the NAS boots and the disks start spinning up within 10-15 seconds.

    I’ll retry this evening and wait a bit longer, could just be I’m the unlucky one with a faulty module. Unfortunately I don’t have any other laptop to verify the module.

  28. Tried Crucial 8GB DDR3L 1600 SODIMM (CT102464BF160B) on 716+ii and it did not work. Blue light keep blinking. The memory should be working as I plugged it into an iMac and the iMac booted up fine.

    Any other memory module that works with DS716+ii ? Thanks

  29. I have the 716+II and can’t seem to get the ram to pop out. The metal bar in there makes it very difficult to navigate. Anyone else have this issue? Am I doing something wrong?

    1. Author

      It can suck, I found that popping each side and then lightly lifting on the module, then reverting back to popping the sides eventually caused the RAM to pop up fully. It takes some fidgeting for sure but should eventually pop as the slot is spring loaded.

  30. Pingback: Upgrading to a Synology DS716+ – Jojo Kahanding's Blog

  31. Used your recommended RAM (Crucial 8GB DDR3L 1600 MT/s (PC3L-12800) SODIMM 204-Pin – CT102464BF160B) on the DS716+II.
    Works like a charm!

  32. Hello. i have DS716+ and wanna try to upgrade the ram, but i have a question:
    This upgrade is good for get better the movie streaming with plex.
    I use plex in apple tv too and sometime message appare: Your network is not enough for streaming this file (or something similar).
    I must modify the /etc/synoinfo.conf ?? or just disable Memory Compression?
    If yes, how i can do it? i don’t know how i can see the synoinfo.conf file, i’m not so much expert.

  33. i do it. And now all is ok.I have had some problems of recognition of RAM, but it is because i not put it correctly the RAM. So if some one have the same problem (Blue light keep blinking), check if you put RAM correctly.

  34. I followed all the steps and it works like a dream. No problems whatsoever booting up. Thanks for your blog Ross.

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