Crucial CT16G4SFD824A RAM works in the Synology DS1819+

[Update 2021-02-06] I finally got around to purchasing a new 16GB stick, and I’m now successfully running 32GB in my Synology 1819+.

[Update 2020-04-20] My Synology has been responding slowly during FCPX edits, so I decided to revisit the RAM that I purchased. It turns out that one of the two 16GB sticks must be bad because I tried the 16+4 stick setup as mentioned earlier, and it wouldn’t boot. I tried the other 16GB stick and it booted quickly. Annoying. The problem was a bad stick all along.

Below is the original post from 18 Dec 2019.

I recently bought two sticks of Crucial 16GB DDR4-2400 SODIMM 1.2V CL17 non-ECC RAM (CT16G4SFD824A) hoping that I could upgrade my Synology DS1819+ from 4GB to 32GB. Unfortunately, when both sticks of the RAM are installed, the NAS doesn’t boot, and instead simply blinks the power light indefinitely (even after waiting 45min).

I did find that when I installed one 16GB stick alongside the existing 4GB stick, the system would boot, recognize the stick and report 20GB of RAM, but it also gave the warning about non-Synology RAM. I’m guessing this is because the RAM I purchased was non-ECC, whereas the Synology RAM is ECC.

For now, I’m returning to my 4GB configuration.


    1. I’ve been running the good 16GB stick for several weeks now without issue. Your link indicates it should work, and from my research, 32GB (two 16GB sticks) should work, so I believe my second stick must be bad. I’d say go for it! If it works for you, let me know and I will update my blog entry accordingly.

      1. Have you tried exchanging the faulty 16gb stick and use a 32GB config in your nas?

        I have the same 16gb ram and it seems to work fine but I am not sure if I should be worried about the error message ”
        Memory configuration that is not compatible with this model is detected. We recommend that you refer to the specifications in the hardware installation guide or on the official website to correct the following memory configuration.
        1. Inserted incompatible memory modules
        2. Mixed memory modules with different size”

        1. Hi, no I haven’t tried exchanging it. Regarding the error message, the Synology OS does this by default for all non-Synology branded RAM to encourage users to purchase their tested and vetted equipment. Personally, I’m not concerned by the message.

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