Memory Power Delivery on M50CYP2SB board

[LukasAlt]

Hello everyone, 

I am currently using a M50CYP2SB board with two Intel® Xeon® Gold 6338 CPUs and are having a couple of questions regarding how power is delivered to the memory (namely VDD and VPP of DDR-4):

The Icelake CPUs have an integrated voltage regulator (IVR) for powering the CPU cores and other on-socket components but the DIMM memory is powered through separate voltage-regulators on the mainboard. However, as stated in the electrical specification [1], a 1.2V power line named V_CCD goes into the CPU and is described as "Power Supply for the processor system memory interface". As far as I understand this, this means that V_CCD powers the integrated memory controller. Is this correct?

My main question now is if the memory DIMMs are powered by the same V_CCD lane? Or, in other words,  is the V_CCD regulated by the same VRMs that also power the memory DIMMs?

The second question is if there are any datasheets on the efficiency of the voltage regulators used on the M50CYP2SB  available? 

Thank you in advance!

[1] https://www.intel.com/content/www/us/en/content-details/732800/3rd-gen-intel-xeon-scalable-processor-codename-ice-lake-sp-datasheet-volume-one-electrical.html?wapkw=3rd%20Gen%20Intel%C2%AE%20Xeon%C2%AE%20Scalable%20processor

[Steven_Intel]

Hello LukasAlt,

Thank you for posting on the Intel® communities.

I will research about the requested information and get back to you as soon as I have an update.

Best regards,

Steven G.

Intel Customer Support Technician.

[Steven_Intel · Accepted solution]

Hello LukasAlt,

I hope you are doing well.

Based on your request, I recommend contacting our direct Intel Support, since this information may not be available publicly and may also require an NDA.

Support Channels:

Chat support: http://intelsupportchat.force.com/icslivechat/ics_tech_processor_ww_english_Chat

EMEA contact information: https://www.intel.com/content/www/us/en/support/contact-support/emea-contact.html

APAC contact information: https://www.intel.com/content/www/us/en/support/contact-support/apac-contact.html

LAR contact information: https://www.intel.la/content/www/xl/es/support/contact-support/lar-contact.html

North America: Phone Number 1-916-377-7000, Monday – Friday 7:00 AM to 5:00 PM (Pacific Time).

Best regards,

Steven G.

Intel Customer Support Technician.

[LukasAlt]

Hello Steven, 

thank you for your research and your response. It's unfortunate that this information may require an NDA.

Regards,

Lukas Alt

[Steven_Intel]

Besides contacting Intel Support directly, feel free to take a look at the How to Apply for an Intel® Resource and Documentation Center (RDC) and/or Intel® Developer Zone (Intel® DevZone) Account (https://www.intel.com/content/www/us/en/support/articles/000058073/programs/resource-and-documentation-center.html).

Thank you for contacting Intel Technical Support.

Best regards,

Steven G.

Intel Customer Support Technician.