A guy I went
to college with went out to work at DEC in Boston testing high
 end Alpha workstations and video cards. He sent screenshots of Quake 2
 running on NT Alpha with ridiculously high end video cards and, at the time,
 insane resolutions (SXGA I believe) They'd run the Q2 benchmark for days on
 end to stress-test the cards. IIRC he claimed Q2 was an ideal burn-in tool,
 as few professional apps used nearly every OpenGL feature simultaneously,
 most were optimized to use a few specific calls at once. 
    IBM ported Quake to AIX for exactly the same reasons.... 
 
A cursory Google search was not successful. This sounds like a great use
of a POWER6. :)
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-- The whippings shall continue until morale improves. ------------------------