Exhibit 24


POWER OF ATTORNEY

(Rule 144 and Section 16(a) Reporting)


KNOW ALL PERSONS BY THESE PRESENTS, that the
undersigned, an officer and/or shareholder of
Cray Inc. (the "Company"), does hereby constitute
and appoint the Chief Executive Officer, the Chief
Financial Officer or Senior Vice President of the
Company, and any of them,
or the individual delegated in writing by them or
either of them, as his true and lawful attorney
and agent to execute in his name any and all
reports required to be filed under Rule 144
under the Securities Act of 1933 and
Section 16(a) of the Securities Exchange Act of 1934
with respect to equity securities of the Company; and to
file the same with the Securities and Exchange
Commission and any applicable stock exchange and
national market system; and the undersigned does hereby
ratify and confirm all that said attorneys and agents,
or any of them, shall do or cause to be done by virtue
hereof.
This Power of Attorney revokes all prior Powers of
Attorney relating to reporting under Rule 144 and
Section 16(a) and shall remain in effect until revoked
by a subsequently filed instrument.

DATED: October 1, 2009


By: /s/ Michael C. Piraino
    Michael C. Piraino