Pentium II no, however my desktop machine and main PC is 2011-era (aside from an upgraded GPU) and it still keeps up just fine. It won't play the very latest AAA titles, but just about anything else is fine. It gets ~50fps at 1080p ultra details in GTA V, which is not shabby at all.

For office and graphical work, it's obviously beyond merely capable. 200+ tabs in Firefox, no problem.