Stefan Mileschin

For everyone waiting for Cascade Lake, Intel’s next server Xeon platform, to be launched, noise is being made from the Power Stamp Alliance and its members about the platform beyond Cascade Lake. Alliance member Bel Power Solutions, along with the Power Stamp website, have exposed several details on the Ice Lake Xeon platform.


The first element of the information is the new socket, set at LGA4189. This is compared to the current Xeon socket, standing at LGA3647, which currently supports the Skylake Xeon family as well as the upcoming Cascade Lake Xeon family. According to the documents, the power pin implementation between the new LGA4189 and LGA3647 sockets are compatible via an adaptor: this isn’t to say the CPUs themselves will be, but it would appear that all the Skylake/Cascade Lake/Ice Lake Xeon families will have a similar power implementation. The reason why we mention the power implementation only is because the Power Stamp Alliance (and Bel Power Solutions) is only dealing with DC-to-DC converters for the platforms, driving efficiency from a high 48V input correlating with the Open Compute Project (OCP) standards and deployments.


Also in this image (and verified at Power Stamp) are the power ranges for Cascade Lake (165-205W, similar to Skylake Xeons) and for Ice Lake (set to go to 230W). Should the new Ice Lake Xeon platform incorporate features such as OmniPath or on-package FPGAs, which Intel has teased future Xeon platforms to be, then 230W is well within the reasons of possibility. Also, having a high DC-to-DC efficiency is going to assist with overall power consumption and power loss.


Delving into the documents, the Power Stamp Alliance designates two code names in play: VR13 (for Skylake and Cascade Lake) and VR13-HC (for Ice Lake). The HC in this case stands for high-current, and the documentation shows ‘a typical’ VR13-HC implementation with two CPUs and sixteen DDR4 memory slots for each CPU. The Bel Power systems documents goes on to say that a VR13-HC system (Ice Lake) with four power stamps meets the VR13-HC minimum requirements, while only three are needed for VR13 (Skylake/Cascade).

https://www.anandtech.com/show/12630...channel-memory