HMC326 seems has two version of chip printing, one is dark ,another is white. Which one is newer? And the is the two version the same in functions?Thanks
If you are referring to the HMC326MS8G, the plating vendor for this device changed in device. You can see additional information in the document referenced below:
I suspect you are just seeing devices from the original and new plating. As long as you received these devices through an official distribution stream, there should be no change in performance.