More trouble than it's worth to create and maintain. GPU's manufacturer's change memory brand depending on what's available. From my experience, the higher tier models have a better chance than the entry level cards in having better quality VRAM.
yea i kinda agree, but i wouldn't mind if people post their S/N an i make a list. i found some serial numbers that helped me save a few thousand $$.
i would hope these new cards i have are atleast micron, micron pushes out great numbers.
i also found this, seems like the strix 580 oc version only has samsung, but then again thats only according to this:
https://www.techpowerup.com/vgabios/191456/asus-rx580-8192-170301