UPDATE:   I have the dell premium service warranty so they sent someone out to my house and swapped out my motherboard in my dell xps 8940 desktop and put in a new motherboard in. Then the 128gb ram works now (the same chips that didnt work before) so some how installing ram modules corrupted the original motherboard/bios and even after a bios reset (with the battery taken out) didnt fix the issue. A new motherboard fixed the problem and i think it did because the bios wasnt messed up in the new unit.   Whats interesting is that i updated the bios after I had this issue, it still didnt fix the issue. So some how installing ram messed up the original motherboard software.    Good thing i got the dell warranty lol
Hey guys,  I have a Dell XPS 8940 with Crucial RAM 64GB Kit (2x32GB) DDR4 3200MHz Desktop Memory CT2K324DFD832A and I've had it running with 64GB ram for about a year now.  I wanted to add an additional 64GB ram set (2 x 32GB ram) because the XPS 8940 can handle 128GB ram. So I bought the same 64GB crucial ram set. But when I installed it, the desktop wouldn't boot. I get the issue of 2 orange flashes and 4 white flashes which means its a ram issue. But what was weird is that after I installed and uninstalled the additional 64GB ram, my pc wouldn't boot with the 64GB ram originally installed on the computer either, it would only book with one 32GB ram stick. I originally had one 32GB ram stick in each while ram slot and it worked before I tried all this but it didn't work after. I could get the pc to boot with just one of ANY of the four 32GB ram sticks but not 2 or 4 of them. So it wasn't like the ram was defective. I read online that I have to reset the bios by removing the motherboard battery which i did but that didnt fix the problem. What fixed the problem of the computer not booting with 64gb ram (even though it originally did) and only with 32gb ram was placing 1 ram stick in a white colored ram slot and 1 ram stick in the black colored ram slot even though they originally were into white colored ram slots.  I was just glad that i got my original 64gb ram to work. So i thought maybe the additional 64gb ram was defective so i got a replacement set but i have the same issue with the replacement ram set and cant get 128gb to work. They are all 4 the same brand. The bios has been updated to the latest version and also every windows and dell update has been installed Any recommendations?  Thank you
XPS 8940, no boot with 128GB ram