There are 2 power connectors in each drive bay on my XPS8950. I replaced the HDD with a 2.5 SATA SSD. There are 2 open SATA slots on the motherboard but there are no extra SATA data cables. The power connectors for each drive bay are not spaced very far apart so that may or may not cause an issue. I am also not sure if you will need straight or right angle connectors on the ends of the data cables.
I don't have an XPS 8950 yet but I'm thinking of buying one. Currently I have an XPS 8900 with four SDDs.  I would like to use two of them in the new XPS 8950.  I would be ordering an XPS 8950 with an M.2 PCIe NVME SDD, 2 TB SATA HDD and optical drive. I understand that I would have one empty 3.5 HDD slot with this configuration.  If I install two SDDs in a 2.5 to 3.5 bracket in that empty HDD slot, are there two additional SATA III and power connections available? (in addition to the SATA/Power pair being used for the 3.5 HDD) So, in total, I would be using four drives: one M.2 NVME, one 3.5 HDD and two 2.5 SDDs (plus one available M.2 NVME space for a potential future upgrade) If this is possible, would I need anything in addition to the 2.5 to 3.5 bracket, SATA cords and power cords that I currently have?
XPS 8950, adding two 2.5 SDDs in addition to 3.5 HDD