Cannot tell if installed memory is dual rank or single rank?

[spacemanspiff]

I've installed some third party memory into my Synology DS418Play and it appears to be working just fine and I believe it is dual rank memory (it's g.skill and it doesn't actually show what rank it is on the label, but looking at the chip configuration, it appears to be dual).

However, I tried to verify this by logging into the NAS via SSH and using

sudo dmidecode --type 17

However, in the result it just says Rank:Unknown.

Is there any other way to check/confirm rank? What about installing an alternate utility like CPU-X or Hardinfo? Is that even possible on a synology nas?

# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.

Handle 0x0024, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0023
Error Information Handle: No Error
Total Width: 8 bits
Data Width: 8 bits
Size: 8192 MB
Form Factor: SODIMM
Set: None
Locator: ChannelA-DIMM0
Bank Locator: BANK 0
Type: DDR3
Type Detail: Synchronous
Speed: 1866 MT/s
Manufacturer: 0420
Serial Number: 00000000
Asset Tag: 9876543210
Part Number: F3-1866C11-8GRSL
Rank: Unknown
Configured Memory Speed: 1866 MT/s
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown