Two that I can see, both look like early/mid-2000 era:
Top left looks like an integrated itx board, possibly a Intel Atom or VIA C3 CPU?
Above his head looks like an Intel P4 gen motherboard, maybe socket 478? Edit: on second glance, the kb is plugged into the mouse’s ps/2 and that’s triggering!
Two that I can see, both look like early/mid-2000 era:
Top left looks like an integrated itx board, possibly a Intel Atom or VIA C3 CPU?
Above his head looks like an Intel P4 gen motherboard, maybe socket 478? Edit: on second glance, the kb is plugged into the mouse’s ps/2 and that’s triggering!