The approved usage is: Itanium® or Intel® Itanium®

Approved Nouns:

architecture
assembler
brand
compiler
instructions
logo
mark
microarchitecture
name
processor
processor family
Solutions
Solutions Alliance
Solutions Guide
trademark

Symbols

Use the trademark symbol in the first appearance of the trademark in a headline, and/or the first prominent use and first appearance in the body of text. The appropriate use of trademark symbols with this trademark is as follows:
Itanium® processor

Acknowledgement Line(s)

Whenever the Itanium® logo appears, the following footnote must also appear: "Intel Inside, Intel Inside logo, and Itanium are trademarks of Intel Corporation in the U.S. and/or other countries."
Whenever the Itanium® brand appears, the following footnote must also appear: "Itanium is a trademark of Intel Corporation in the U.S. and/or other countries."

Processor Numbers:

For processor number information please refer to http://www.intel.com/content/www/us/en/processors/processor-numbers.html

Sample Usage Chart

Correct Usage	Incorrect Usage
Intel® Itanium® processor	Itanium by Intel®
Itanium® processor power!	Itanium Power!
Motherboard for an Itanium® processor	Itanium motherboard
ABC system with an Itanium® processor	ABC Itanium™ system
Computer containing an Itanium® processor	Itanium computerr
System with an Intel® Itanium® processor	Intel Itanium system