Re:I want to replace the 128Gb NVMe M.2 with a 500Gb NVMe M.2. I am trying to find out what kind I need to get to make sure it’s comparable but I am running into issues since it says it had a proprietary motherboard. yes the 5090 motherboard is proprietary but there is nothing proprietary about its M.2 slot (nor is its cpu socket or memory slot).  It has to follow industry standard. Dell does not make its own proprietary ssd.  You can order any standard M.2 2230/2280 solid-state drive.  
Hi! I just ordered a Dell G5 gaming desktop last night and I am looking at upgrading one of the parts already!.  I can’t tell if it’s a 5000 or 5090 model from the description... hopefully it won’t matter for my question.    I selected an option that has dual drives, a 128Gb NVMe M.2 ssd and a 1Tb SATA 3 HDD. I want to replace the 128Gb NVMe M.2 with a 500Gb NVMe M.2. I am trying to find out what kind I need to get to make sure it’s comparable but I am running into issues since it says it had a proprietary motherboard.  Can someone please help me?
G5 desktop ssd slots