Single DVD Slot Mac Pro Identification

[Ursadorable]

Good morning!

I have someone trying to sell two Mac Pros online. They seem to know nothing about Mac's, but posted some pictures.

The units in question have only one flip down slot on the front for a DVD tray.

Google isn't being very helpful when I try to figure out which models these may be.

What models only came with one slot on the front? My 3,1 has two, as did my 1,1.

Thanks!

 

[StuAff]

If it only has a single bay on the front, it's a G5 not an Mac Pro.

 

[Ursadorable]

Hmm.. interesting.

I thought the G5 had two fans on the back.

Picture of units in question, attached.

 

[StuAff]

G5 on the left- that's definitely only a single front bay- but the one on the right's a Pro.

 

[Ursadorable]

Ok, thank you very much!