HP Prodesk 600 G3 MT Desktop Used Grade B/C, i3-7100, 4GB RAM, 500GB HDD Win 10
It’s 7th-gen, but the i3-7100 stacks up really well compared to the G4900. The ProDesk 600 G3 MT also has more features such as dual Displayport and USB-C. It’s also a little larger, offering 4 low profile expansion slots instead of just two.
HP Documentation: https://www8.hp.com/h20195/V2/GetPDF.aspx/4aa6-9333eee
HP Service Guide: http://content.etilize.com/User-Manual/1038382296.pdf