What is fun is that the 2GB memory modules use different x16 4Gbit DRAM chips. Interestingly, I hasn't seen any DDR4 DIMM/SO-DIMMs based on x16 chips, not even

What is fun is that the 2GB memory modules use different x16 4Gbit DRAM chips. Interestingly, I hasn't seen any DDR4 DIMM/SO-DIMMs based on x16 chips, not even 8Gbit ones. Are they really not allowed?