That depends on the markings and the condition.
Pentium pro's were released by Intel in two types. One being "standard" production chips, the other being Engineering Sample/ Qualification Sample chips.
The two types can be distinguished by the middle engraving in the ceramic above the gold heatspreader. This is call the sSpec code.
Standard production chips have codes like SL22T, SL22U etc..
ES/ QS chips have a code beginning with Q, like Q004 etc.
I'll pay 50-100GBP for the following production chips and Qxxx chips:
SY014 SL2FJ
QSpec:
Any except, Q0815
For other codes I know buyers who will pay a little less, but certainly above the scrap value.
Here is a list of all the possible chip SSpec markings:
SY - sSpec#
SY002 SY011 SY010 SY012 SY013 SY014 SY031 SY032
SY034 SY039 SY040 SY047 SY048
SL - sSpec#
SL2FJ SL22S SL22T SL22U SL22V SL22X SL22Z SL23L
SL23M SL245 SL247 SL254 SL255 SL259 SL25A
SU - sSpec#
SU103 SU104
Q - sSpec#
Q008, Q009, Q010, Q011, Q033, Q034, Q035, Q036, Q076, Q083, Q084 Q0812 Q0813 Q0815 Q0816 Q0822
Q0825 Q0826 Q0856 Q0858 Q0859 Q0860 Q0864 Q0865 Q0871
Q0872 Q0873 Q0874 Q0907 Q0908 Q0909 Q0910 Q0918
Q0920 Q0924 Q0929 Q932 Q935 Q936
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