Have you got a reply from them?
If you were able to buy the same kind fans at you local (nearest) stores, Maybe you should buy it one, Just curious to compare it.

- No reply yet.
- I have bought another batch of 6 fans from another seller on Aliexpress in order to compare. I'll post my result here.
Sound good.

I was wiring all of my Delta fans using Industrial Switching Power Supply (
quite cheap), may it can be your alternative (
in case you facing the same issue next time), with the number of your fans, you'll need a few.
