QM2 Expansion Cards explained
I am not a pro IT person like yourself and followed your advice and purchased a TS-251D and have been very happy
I am looking to expand the NAS with some SSD cache and I am confused about the difference between QM2-2P-244A vs QM2-2P-344 cards except that the 344 is slightly more expensive.. 🙂
I just want to expand NAS with 1 or 2 SSD’s and not bothered about 10GBs RJ45 and confused about the difference between the 244 and 344
Appreciate your feedback if you get chance?
Here is a decoded version of a model number:
Q – Qnap
M2 – m.2
-2 – m.2 slots
P – nvme
-3 – gen 3
4 -x 4 lanes
4 – 4 internal x lanes
The speed difference between these two cards is as follows:
QM2-2P-244A -> 2GB/s
QM2-2P-344 -> 4GB/s
The speed of TS-251D PCIe is around 2000MB/s
So I would recommend QM2-2P-244A unless you would move this card to a future NAS. Then Gen3 would be useful.
I hope this helps.