[NAME]  put 4 gig modules in white slots and the single module in the black slot closest to cpu mixing size and vendor and speed and rank is not supported so it may not work with the single 8 gig module unless its stand alone with no other modules.  
Hey guys, I cannot find official documentation on how to fill my ram slots on my Optiplex 9010SFF.  My Chips match and I think they are the original chips that came with it, hynx brand.   Right now I have One 8GB Chip in the White Slot closet to the cpu. And have Two 4GB Chips in the Black Slots From what I've seen on youtube the White Slots should be filled first? Any help would be appreciated!
How to fill RAM Slots Optiplex 9010 SFF