Intel is preparing to significantly expand its 12th Gen Core "Alder Lake" desktop processor series next January, alongside more motherboard chipset choices for the client-desktop segment. These include the H670, the B660, and the H610. The H670 offers most of the I/O features of the top Z690 chipset, but you lose out on CPU overclocking. The B660 is the mid-tier option, and while you still get a formidable I/O feature-set, the chipset bus is narrower. The H610 is the entry-level chipset with very basic I/O, and no CPU-attached NVMe slots. The interesting thing is that all these chipsets support PCI-Express 5.0 x16 (PEG) from the CPU, but leave it to the motherboard vendors whether they want to implement it. There do exist Z690 motherboard that lack Gen 5 PEG (and only feature Gen 4).
The chipset-attached downstream PCIe also varies greatly across the lineup. The top Z690 part puts out 12 Gen 4 lanes besides 16 Gen 3 lanes; while the H670 puts out 12 each of Gen 4 and Gen 3. The B660 puts out 6 Gen 4 lanes and 8 Gen 3 lanes. The H610 completely lacks downstream Gen 4, and only puts out 8 Gen 3 lanes. The H670 and B660 put out up to two 20 Gbps USB 3.2 Gen 2×2 ports; while the H610 lacks 20 Gbps ports. All chipset models put out at least two 10 Gbps Gen 2×1 ports; and at least four 5 Gbps Gen 1×1 ports. An interesting aspect of the lineup is that Intel is allowing memory overclocking across H670 and B660 chipsets, provided the CPU supports it.
