We have few unit's (let say 8 of the 30 unit's card) was failure when deploy on site...
How we found he card is problem or failure? When we suspect the card is malfunction, we move the hand to the heatsink and found that card is very hot and some cause the routerboard was not working (Still pending mikrotik finding)...
But, the rest whichever have no problem, so far, it's perform very well...
erm, form my point of view...
-If the card problem, then that's problematic...
-If the card working well, then the performance is extreme good....
How i going to give comment?