Exposure shows that Intel’s next-generation mainstream desktop processor comet lake-s will replace the new lga1200 interface with the new 400 series motherboard, with up to 10 cores and 20 threads, but it is still the 14nm process and skylake architecture.
In the server field, the new generation of scalable copper lake to be released by Intel is still the continuation of the 14nm skylake family, but the interface will also be replaced with a new lga4189 from lga3647, and then the 10nm ice lake will continue this interface.
Although Intel has never officially confirmed this, the connector manufacturer te connectivity (Tyco Electronics) has made a “pig teammate” and announced that its lga4189 socket has passed Intel certification. It is now supplied to server motherboard and system manufacturers, including base, backplane, support frame, installation fastener, dust cover and so on.
Why change the interface when the process architecture remains unchanged? It may be similar to the desktop. In order to support more core and memory, more advanced PCIe is required.
At present, Intel Xeon only has 28 core 56 threads and six channel ddr4-3200 memory at most, and only supports 48 PCIe 3.0. The competitive products achieve 64 core 128 threads, eight channel ddr4-2666 and 128 PCIe 4.0.
Although the second generation scalable Xeon family also has 56 cores and 112 threads, it is not only packaged by dual die integration, but also made into a BGA mode directly welded on the motherboard instead of an independent LGA socket, which is obviously a temporary rush.
Intel has previously announced that copper lake will achieve 56 cores and 112 threads, and it is an LGA independent socket, which will be available in the first half of next year.
According to the information given by the third-party organization, copper lake will also introduce eight channel memory and PCIe 4.0 to fully keep pace with AMD Xiaolong.
So many changes are bound to require new interfaces, so lga4189 came into being. It is also divided into two versions, lga4189-4 and lga4189-5, also known as socket P4 and socket P5 (now lga3647 is also called socket P).
Physical dimensions of two interfaces (77.66) × 56.6mm), the pin layout, spacing and fixing method are exactly the same, but the width dimensions of the left and right zones are different.
It is unclear why Intel wants to divide the same interface into two versions. Maybe one of them is specially built for high-end models with more cores and more memory channels?