Hi all,

There's a similar post (there's was the 9029 SFF) on here asking this same question, from 2017-- never answered.

Here I am, two years later, asking again:

The user manual for the Optiplex 9020 FULL TOWER states that the board has:

SATA 1, 2, & 3. This board has 4 ports in total....there are NO markings on the board re: slot speed.

WHICH ONES ARE WHAT SPEED? Honestly. Question has been asked EVERYWHERE on the internet. WHY can't Dell ANSWER any of them?

It's ridiculous to rely on "the community" when most questions are similar to mine: Dell NOT disclosing basics of their own systems and then IGNORING support questions from their own clients.

If this setup weren't a favor I'm doing for some older folks, I'd have tossed the thing and gotten them a 2nd-hand anything else.