Installing U.2 drive in Precision T7920

Is this what I need?

Dell Precision T7920 Rear Flexbay 3 & 4 HDD Upgrade Kit Connect to Controller | eBay

If you don't mind me asking, do you have a specific use case that requires U.2 drives?

If not, you'll likely find it considerably cheaper to add an NVMe adaptor (anything from 1 to 4 NVMe drives) and populate it. 

e.g. In the UK, you can get adaptor for a single NVMe drive (needs an x4 slot) for under £20, the dual NVMe (x8 slot) and quad NVMe (x16 slot) Dell Ultraspeed adaptors tend to be around £45 and £75 respectively on eBay.

Then it's just a matter of your preference in drives, personally I like the Crucial T500 series (currently £77 (1TB) / £127 (2TB) / £246 (4TB) on Amazon UK) - compare that to Samsung PM9A3 U.2 drives from Scan at £218 (1TB) / £410 (2TB) / £620 (4TB)

Only downside is that the generally-available, and sensibly priced, NVMe drives are currently topping out at 8TB. e.g. the WD Black SN850X 8TB can normally be found on offer for somewhere around £500.

U.2 has the benefit of being available in larger sizes e.g. Samsung PM9A3 7.6TB at £1,620 or 15.4TB at £2,880 all the way up to something like a 61TB Micron at £7,400 - although if you're in the market for a 61TB U.2, it's unlikely to be going into a T7920

@PapaPee​ No use really for a U.2 drive lol, was getting a bit carried away

I have purchased this flex bay kit Dell Precision T7920 Rear Flexbay 3 & 4 HDD Upgrade Kit Connect to Controller | eBay

Can I add a M.2 drive to it and some SATA drives?

Would I need to purchase a separate  MegaRAID controller card or can I use the connecters on the motherboard.

@claytonb ><lol>  no problem with getting carried away, it's happened with me many, many times...

The Dell kits are all a bit of a magical mystery tour but as that one says 'HDD Upgrade Kit', and it looks like this kit on Amazon UK https://www.amazon.co.uk/dp/B0C5CBG6YQ   I would think that it's likely to be for SATA drives (SSD or HDD) but I guess you'll find out when it turns up

TBH if you want to boot the OS from a SATA SSD in one of these bays it should be fairly straightforward to select it as the boot drive in the BIOS.

@PapaPee​ thanks, Looks like my purchase does not support SAS/M.2 drives without a controller card or another type of  back pane 

Oh well, I'll just add more SATA storage drives, not like I need them, all I wanted to do is move away from the PCI-e Gen 3 M.2 Quad Card due to Windows 11 24H2/25H2 update trying to install Phison Controller drivers and getting BSOD's.

I would still like the speeds of my current setup

@claytonb  I've just realised that the other thread on NVMe controller BSOD is yours :-)

SATA won't give you the speed of NVMe but you might find that putting the OS on a SATA drive and relocating as much else as possible (TEMP directories, page files, user folders, new software installations etc.) to an NVMe drive will keep the speed of your system up - the boot itself will be a little slower but unless you sit around waiting for the machine to load the OS, you're unlikely to notice

Another alternative is to use Group Policy to prevent Windows from updating the device driver for the Dell Ultraspeed cards - I'll add a post to your other thread about this as it's probably best to keep all the NVMe driver discussion on that thread.