That only means that you can't install two CPU on a Z420.
Also means that the 2665 support 2 CPU, not that you can't install it on a single socket motherboard like the one on the Z420.
That only means that you can't install two CPU on a Z420.
Also means that the 2665 support 2 CPU, not that you can't install it on a single socket motherboard like the one on the Z420.