In this roundup we have 8 new Intel B660 motherboards that go for from $150 to $250. Spoiler alert: We're looking at a hefty 70% performance difference between the fastest and slowest B660 boards using fast CPU.
Basically most of these boards will have PCIe 4.0 x 16 for the video adaptor. Some of the premium priced boards will have PCIe 5.0 x16. The video adaptor slots are powered by the CPU.
The additional PCIe slots are mostly PCIe 3.0 x1. The higher priced boards may include a PCIE x16 slot that is wired for PCIE x4 speeds. These slots may either support PCIE 3.0 or 4.0. They are powered from the B660 chipset.
The B660 chipset connects to the CPU via a DMI4 x4 link.