Technical Advisory

for certifications in certain markets that have adopted IEC (International) or / EN (European) 61000-4-5 regulatory

standards.

Root Cause

The problem was isolated to the PSU microcontroller reset IC turning the PSU off during surge. Not all power supplies

are susceptible due to shifts in parametric data and tolerances.

Corrective Action / Resolution

Intel has certification reports based on valid samples of product demonstrating compliance for the field; however Intel

cannot ensure the compliance of each and every unit. To provide additional margin to address shifts in parametric data

and tolerances Intel has increased the power supply surge immunity by improving noise immunity of the power supply

microcontroller reset IC. This has been done in two phases:

Phase 1 - Product has been made compliant by adding an insulator between the transformer wires and daughter

card within the power supply. These power supplies remain at a E98791-006 version but have been marked with

a GREEN DOT (see picture). This creates an estimated margin of 10% and allows shipments to resume

immediately.

Phase 2 - The power supply incorporates the first change plus changes of two resistors. This creates an

estimated combined margin of 20%. The Power supply version will evolve from E98791-006 to E98791-007 to

incorporate both changes. New system builds will include the -007 version and will begin to ship on July 27

Please contact your Intel Sales Representative if you require more specific information about this issue.

Enterprise Platforms & Services Division

Intel Corporation