I'm not sure what the norm is in industry, but
Merriam-Webster believes that
the plural of "die" is always "dies", with the exception of the
random
number generator type of "die".
http://www.merriam-webster.com/dictionary/die?show=0&t=1359064230
Non-techncila dictionaries are not always the most relaible source of
information on techncial terms. Does said dictionary mention that the
word 'die' is used for the actual silicon chip?
Certianly I've always seen 'dice' as the plural of 'die' in this
sesne.
And thuis it's what I use myself. For eample I might say soemthing like :
'The CPU in an HP65 is a multichip module containing 6 dice, which are :
clock buffer and reset; arithmetic and registers; control and timing; 2
RAMs; and the card reader interface'
-tony