20 Sep 2003, 10:15, Wayne Chirnside (2:252/171), wrote to Matt Mc_carthy:

Hi Wayne.

 MM>> Nor have I!  The original Pentium series was a "PGA", Pin Grid 
 MM>> Array type chip.  A large reddish colored ceramic square with all 
 MM>> the pins under it.  Later they came up with the smaller black 
 MM>> pinless plastic chip intended to be soldered directly onto MBs, but 
 MM>> instead soldered to a small PCB with all the pins on it to be used 
 MM>> in the socket motherboards.  This was (I think) the
"PFPG" chip, 
 MM>> Plastic Flat Pinless Grid chip soldered onto an adapter board.  What 
 MM>> I think you are seeing is the top ends of all the pins sticking 
 MM>> through the adapter PCB.

 WC>  That's what it looks like.

 MM>> If that is the case,
 MM>> the tops of the pins should be well below the top of the CPU 
 MM>> itself, and a regular heatsink that uses a flat strap to snap onto 
 MM>> the tabs of the socket should work fine.  The bottoms of the 
 MM>> heatsinks are normally anodized, and are non-conductive, unless 
 MM>> the anodizing has been machined off.

 WC> Well I've never seen a flat strap heatsink retainer either
 WC> but shall check into a computer build shop for one.

 WC> I was thinking about a dab thermal compound and a dab of gel
 WC> super glue around the edge of the thermal contact area.
 WC> What do you think about this?

I've not had much luck with super glue on things that heat up, and
especially things that heat (expand) and cool (shrink).  The Super glues
are too brittle and crack easily.  

As an afterthought, (I've NOT tried this), some of that "High
Temp" Silicone sealant from an automotive store might do the job,
especially if they have a non-conductive version.  Put a chocolate chip
sized 'dab' in each of the four corners of the adapter board right over the
tops of the pins, put heat sink on with compound, clamp lightly for 24
hours.  Any shrinkage as the silicone sets would only tighten the heat
sink, and with the extra space over the pins, a slice with a razor would
remove the bond easily if ever needed. 


     Good luck...  M.

--- Msged/386 TE 06 (pre)