Timetec DDR3-1866L 4GB Replacement for Synology D3NS1866L-4G Non-ECC Unbuffered SODIMM DDR3L 1866Mhz PC3L-14900 1.35V Memory RAM (Compatible for DS620slim, DS218+, DS718+, DS918+, DS418play)

Good products just plug and play

This works perfectly in Synology DS918+, to increase the memory from stock to 8gb - the maximum supported.I ran a full memory test, and no errors reported. Very happy that I bought this rather than the 'official' Synology version - which was multiples more expensive.

DS1621+ DSM7 prefect with no warning!

I've never used this RAM brand before so wasn't sure what to expect. Installed two sticks in my DS1821+ running the latest, at time of writing, DSM 7.1. So far no issues at all. Restart didn't take much longer than normal and 32GB immediately showed up. I was surprised NO errors or warnings popped up. A quick command line check showed this is in fact ECC RAM which might be why it went so smooth. I'll update if any problems arise but right now this is probably the best bang for your buck. Synology doesn't seem to understand they would sell a lot more RAM if it was priced in a normal range, too bad for them, buy this instead.

This was installed on a DS918+ running DSM 7 to increase the memory from 4 GB to 8 GB. After installing the RAM, the NAS doesn't boot up. It's stuck on the blinking blue light. It's supposed to run through an initial memory check but after 1.5 hours it's still stuck in that state. After removing this RAM and leaving the stock 4 GB, the NAS booted up successfully.Edit (2022-12-07):Per suggestion by the vendor, I’ve returned it because it may be defective and purchased another to try again. I’ll update again when the new one arrives.Edit (2022-12-16):The new RAM arrived and it also didn't work. The issue is not with the NAS because removing the stock RAM and using only this one in the same slot also didn't work. Putting the stock RAM back in and the NAS booted up just fine.

Bought for DS1821+. Memory test reported no issues and DSM 7 shows no errors or warnings.Output of dmidecode -t memory is as follows:# dmidecode 3.2Getting SMBIOS data from sysfs.SMBIOS 3.1.1 present.Handle 0x001E, DMI type 16, 23 bytesPhysical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Multi-bit ECC Maximum Capacity: 64 GB Error Information Handle: 0x0021 Number Of Devices: 2Handle 0x001F, DMI type 17, 40 bytesMemory Device Array Handle: 0x001E Error Information Handle: 0x0022 Total Width: 72 bits Data Width: 64 bits Size: 16384 MB Form Factor: SODIMM Set: None Locator: DIMM 0 Bank Locator: P0 CHANNEL A Type: DDR4 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 2667 MT/s Manufacturer: Hynix Serial Number: 85195302 Asset Tag: Not Specified Part Number: HMA82GS7DJR8N-VK Rank: 2 Configured Memory Speed: 2400 MT/s Minimum Voltage: 1.2 V Maximum Voltage: 1.2 V Configured Voltage: 1.2 VHandle 0x0020, DMI type 17, 40 bytesMemory Device Array Handle: 0x001E Error Information Handle: 0x0023 Total Width: 72 bits Data Width: 64 bits Size: 16384 MB Form Factor: SODIMM Set: None Locator: DIMM 0 Bank Locator: P0 CHANNEL B Type: DDR4 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 2667 MT/s Manufacturer: Hynix Serial Number: 851952FA Asset Tag: Not Specified Part Number: HMA82GS7DJR8N-VK Rank: 2 Configured Memory Speed: 2400 MT/s Minimum Voltage: 1.2 V Maximum Voltage: 1.2 V Configured Voltage: 1.2 V