Omg so for a few weeks now I have been getting terrible speeds when trying to stream from my syno 418play to my 4k tv. my internet is fast(300mbps) and I don’t have really anyone or thing running on my nas or network. I recently noticed that I am only running 2gb of ram on my 418play. Can anyone recommend where I can get a matching pair to boost my system and how many gb of ram cam my system handle if they are matched?
I appreciate the help in advance. 
Internet has nothing to do when you are streaming locally from NAS to TV.
Officialy Synology says DS418play can take up to 6GB RAM but you should read that:
Wow good looking out @“Bartlomiej Baraniec” 16gb sounds a hell of a lot better than 8gb!
CAUTION!!!
The J3355 DOES NOT ADDRESS 16 GB OF MEMORY
Memory Specifications
Max Memory Size (dependent on memory type)
8 GB
Memory Types
DDR3L/LPDDR3 up to 1866 MT/s; LPDDR4 up to 2400 MT/s
Max # of Memory Channels
2
ECC Memory Supported ‡
No
Per: https://ark.intel.com/products/95597/Intel-Celeron-Processor-J3355-2M-Cache-up-to-2_5-GHz
@ChuckPA just got done reading through the article as well as the info you previous sent me. I’ll be sticking to 8gb. Thanks again.
@ChuckPA so what does that mean exactly? You can put 16GB in, device going to recognize 16GB but be able to use only 8GB?
@“Bartlomiej Baraniec” said:
@ChuckPA so what does that mean exactly? You can put 16GB in, device going to recognize 16GB but be able to use only 8GB?
Correct.
I am puzzled why it (or DSM) reports 16. That, in and of itself, is highly suspicious. DSM might be reading the capacity of the chip and doing math but the CPU only has the address lines to directly reach 8GB
@ChuckPA So in addition to the ram upgrade, I am trying to wrap my head around the purpose or the “perk” of using a solid state drive in one of my bays? Would I essentially be running the brains or Plex from the SSD and using the other HD as my storage? Do I really need to do this and just how much fast will this make my machine. I understand the SSD has zero latency which is outstanding so there must be some benefit.
Picture it this way:
RAM = Super fast but when the power is off, it’s gone. Measured in speeds around 180 Gb/sec and 2400 million operations/sec
SSD = Faster like RAM but permanent like disk. Measured speeds from 500 MB/sec -> 2000 MB/sec (depends on type) and 80,000 operations/sec
DISK = A LOT slower but it’s permanent storage until you erase it or write over it. (Measured in speeds like 250 MB/sec, 200 operations/sec)
In the OS, the SSD cache sits between RAM and DISK. It’s either “Slow RAM” or “Super Fast DISK” , neat huh?
Today I buy a 8GB Kingston D3L-1600 CL11 1.35V (1600KVR16LS11/8), Successful upgrade Synology 418Play memory from 2GB (Original) to 10GB ( Add 8GB). As vendor advise, Synology 418 play can be upgrade to 16GB (8GB x 2)
So there is absolutely no confusion, and Synology wouldn’t advise you to upgrade to 16 GB because it’s BS.
Is there a suggested pair for 4GB chips that is recommended to bring the DS418play up to 8GB ?
Crucial 8GB DDR3 1866 MHz SO-DIMM Memory Kit (2 x 4GB) MFR # CT2K51264BF186DJ
Synology has 4GB modules at their store. They are all the same spec. You can search for memory by model.
If you use their memory, and there are any issues, it’s much easier to get support.
If it helps, I bought this set of G.SKILL Ripjaws Series 8GB RAM and installed it in my 418play. I have no problems whatsoever on anything that I have tried to play. This memory was easy to install, recognized by the system and was the cheapest buy at the link I provided. As ChurckPA wrote, I am not sure that the system can use 16 GB of memory. You want to check the specs of what Synology offers and then find something comparable.
EDIT: Just to be clear the RAM I recommended is a 2x4GB set. After scouring the forums at Synology, their own specs on the RAM they sell, and the Intel processor page I went with this one. It meets all the requirements and was at a good price point.
As I have cautioned everyone, you must review the processor specifications about maximum addressable memory.
While any of the products will let you put more in than it can address, whether it’s usable or not is the question.
As prime example, I cite the Intel J3455 used in the DS918+.
Many think it can hold 16GB. It can actually hold 32.
Per the Intel spec, it can only adress 8GB.
Result: Unbalanced memory configuration and wasted money.
2x 4GB is perfect for the J3455.
I do not see where the ARMv8 will be any different. I am searching for the address line out pin spec for the RTD129x processors so I can verify max physical memory.
Please verify and know what is supported by the CPU before adding memory.
Hi
“CPU can only address 8GB per channel (slot). So max 16GB (2x8GB).”
But the CPU itself can only address 8GB (Intel specification).
You may see 16 GB but it can only use 8 so why buy 16 ?
2x 4GB is all you need.
Then kindly explain why Intel specs state:
Prove why intel, the chip maker is wrong.
I go over this argument at least once every few months.
- The RAM has a SPD chip on it. This tells Linux the size.
- The kernel can be fooled, specifically the Synology kernel. because 8 + 8 = 16, which is what it displays.
- Write a C program which locks kernel memory in increasing increments of 1GB. You will eventually need reboot the NAS to get control back but you will see that only 8GB if RAM can be addressed by the processor.
- Do not confuse ASIC addressability with CPU addressability. The ASIC is more capable than the CPU and can reach further IF the address lines exist and the memory multiplexer are configured to support it.
8gb per channel
explain this:
CPU: Celeron J3355
max. 16 GB
