Retro

Gotcha. If the m.2 is cheaper (and consider additional HBAs or Adapters or chassis you’d need), then I’d go m.2 still. Just figured SATA might be a little more straightforward and is typically cheaper. Seems reasonable enough.

Never tried a build withe M.2 drives, but unless you have a workload that actually needs that kind of speed, SATA SSDs might be better bang for the buck (especially if those m.2 drives aren’t nvme). If you’re just storing media or something, hard drives are probably still the way to go.

Should be fine. All the memory will just need to run at the speed of the slower kit. Make sure you put the sticks in the correct channels for dual channel support. But yeah, maybe only do so when you actually need the memory.