Here is one of the PCs I use now. Without digging in too deeply, the Pi has 4 cores vs. your two separate chips. If I recall that memory correctly, the Pis RAM should be faster. A Pi3B has more memory, though some is used by the GPU. NIC is the same, but you'll lose WOL. USB is the same. The Pis vi...

Here is one of the PCs I use now. CPU: Dual Pentium 3 600MHz SMP RAM: 768MB PC100 NIC: 10/100 on PCI card, with WOL cable USB: 1.1 on motherboard, 2.0 on PCI card Audio: Sound Blaster Live! 5.1 DE on PCI card Video: AGP 2X HDD: PATA 7200rpm I use this box for light server duty (DNS, LDAP, printing, ...