What's an XPS 8430? Did you mean XPS 8930 or maybe 8940? Did you install the SATA SSD or did it come that way? Seems odd Dell would install a SATA SSD instead of an NVME SSD. To answer your question, if this is a  M.2 SATA SSD, you  will have to remove it add to add an M.2 NVME SSD. An NVME SSD will be ~5-6x faster than a SATA SSD so you might want to consider getting a big NVME SSD for Windows, apps, games etc, and moving everything onto the NVME SSD. EDITED
Hey all! I just made a great search but as I'm not a PC expert, maybe someone here can help me. My PC is a Dell XPS 8430 and I'm looking for a new M.2 NVMe SSD to add in my PC, so I saw the specs of my motherboard to see the compatibility. My only reason to buy it is to play games that requires a lot of my PC, both in memory and speed, and I can't install them because there's no longer space in my current C: drive (LITE-ON CV8-8E256-11 SATA 256GB), and it's almost impossible to play heavy games in HDDs. So, I opened my PC, and saw there is already a SATA SSD (obviously), where the windows operational system and almost everything in my PC is in. According to my PC specs, my motherboard has the following information about the ports and: [IMAGE] and [IMAGE] I just cant figure out if I it is possible to add/install a M.2 NVMe in the motherboard while keeping the current SATA SSD. I would just use the new ssd for games, i don't wanna clone everything or make an upgrade, i just wanna add one more ssd. In the specs it says on Table 11 M.2 card: One M.2 card slot for SSD (SATA or PCIe/NVMe) I don't know if that slot fits only one ssd, or two. I saw in my motherboard there is 2 slots, both in #8. I thought in the other one was the WiFi and Bluetooth combo card, but almost sure it is in #17: [IMAGE] In short, I just wanna play my games in the new m.2 ssd without removing the current SATA ssd, I don't know if it possible to use both at the same time, thanks for the attention!      
Add M.2 NVMe SSD while keeping SATA SDD