18 Sep 2003, 21:04, Wayne Chirnside (2:252/171), wrote to All:

Hi Wayne.

 WC> Ok I've never seen a Pentium MMX or any other CPU
 WC> with contacts on the top of the microprocessor.

Nor have I!  The original Pentium series was a "PGA", Pin Grid
Array type chip.  A large reddish colored ceramic square with all the pins
under it.  Later they came up with the smaller black pinless plastic chip
intended to be soldered directly onto MBs, but instead soldered to a small
PCB with all the pins on it to be used in the socket motherboards.  This
was (I think) the "PFPG" chip, Plastic Flat Pinless Grid chip
soldered onto an adapter board.  What I think you are seeing is the top
ends of all the pins sticking through the adapter PCB.  If that is the
case, the tops of the pins should be well below the top of the CPU itself,
and a regular heatsink that uses a flat strap to snap onto the tabs of the
socket should work fine.  The bottoms of the heatsinks are normally
anodized, and are non-conductive, unless the anodizing has been machined
off.

 WC> What's the deal with the heatsink here?

 WC> Can I use a standard heatsink that mounts flush on my
 WC> other CPU,is there some adapter or mask placed between the CPU
 WC> and heatsink?

 WC> Do I need to acquire some entirely new heatsink
 WC> designed for this chip?

 WC> Any advise would be appreciated as I was hoping to get this
 WC> backup machine up in two weeks.


     Good luck...  M.

--- Msged/386 TE 06 (pre)