My Pentium Pro cooling solution was to use a regular Pentium Pro heatsink and attached a Noctua fan to it.

I did this by gluing screws in place on the fan and then attaching it to the heatsink with rubber grommets.

Shponglefan wrote on 2024-01-31, 21:48:

My Pentium Pro cooling solution was to use a regular Pentium Pro heatsink and attached a Noctua fan to it.

I did this by gluing screws in place on the fan and then attaching it to the heatsink with rubber grommets.

Hey! That's really cool the way you mounted the fan. Where did you find your heat sink though?

boggsman wrote on 2024-01-31, 21:53:

Hey! That's really cool the way you mounted the fan. Where did you find your heat sink though?

I think it was included with one of the Pentium Pro's I bought.

Yeah the difficult part is finding a heatsink that fits the socket. The fan is trivial

Umm.. Are AM2 coolers compatible with Socket 8? I would think not.. Let me check..

EDIT: I can't seem to find Socket 8 dimensions anywhere online, the specification document by Intel seems to have disappeared..

Maybe there is a way to make a pcb shim that would help mount something else?

Hi, it not actually AM2 cooler but CNPS 90 cooler that fit the socket 8

I think it from this thread.
Unboxing a new Pentium Pro processor

nhattu1986 wrote on 2024-02-01, 09:27:

Hi, it not actually AM2 cooler but CNPS 90 cooler that fit the socket 8

I think it from this thread.
Unboxing a new Pentium Pro processor

Well.. Wait, I actually have quite a few Chinese knockoffs of that thing lying about that I used on AM2/3 builds.. I need to try this out!

nhattu1986 wrote on 2024-02-01, 09:27:

Hi, it not actually AM2 cooler but CNPS 90 cooler that fit the socket 8

I think it from this thread.
Unboxing a new Pentium Pro processor

Does anyone know how he made that work? That's what I need!

appiah4 wrote on 2024-02-01, 09:39:

nhattu1986 wrote on 2024-02-01, 09:27:

Hi, it not actually AM2 cooler but CNPS 90 cooler that fit the socket 8

I think it from this thread.
Unboxing a new Pentium Pro processor

Well.. Wait, I actually have quite a few Chinese knockoffs of that thing lying about that I used on AM2/3 builds.. I need to try this out!

Can you try it for me and let me know? I am keen on doing the same thing. Thanks!

appiah4 wrote on 2024-02-01, 07:16:

Umm.. Are AM2 coolers compatible with Socket 8? I would think not.. Let me check..

EDIT: I can't seem to find Socket 8 dimensions anywhere online, the specification document by Intel seems to have disappeared..

Some specs are in the P Pro Intel datasheet. They list chip size at 2.46"x2.66" but the thermal parms list HS 2.235" square on page 62...
most all the P.Pro HS I have are 2.5"x2.75" but the AOC one, it is 2-3/4" x 3-1/4" with a cutout on one side.
added: the "Pentium® Pro Processor Thermal Design Guidelines" also gives some but the cpu datasheet has more info imho....

It turns out I don't have any of the flow type coolers lying about anymore, but one aluminum block type cooler I happen to have actually LOOKS like it just might fit surprisingly well, though I have yet to try it with a CPU in the socket due to lack of time. If anyone else is adventurous and wants to give it a try for science, let us know here in the meantime!

EDIT: I ordered two of these flower type AM2/LGA775 coolers as they seem to cost peanuts online, I will keep you guys posted. If they don't fit, I'm sure I can use them in other projects eventually.

The only issue that I see is that it looks like the middle is centered between the two clips. On the ppro it is offset to one side. But maybe the surface is large enough to cover the whole CPU.

appiah4 wrote on 2024-02-02, 05:33:

It turns out I don't have any of the flow type coolers lying about anymore, but one aluminum block type cooler I happen to have actually LOOKS like it just might fit surprisingly well, though I have yet to try it with a CPU in the socket due to lack of time. If anyone else is adventurous and wants to give it a try for science, let us know here in the meantime!

EDIT: I ordered two of these flower type AM2/LGA775 coolers as they seem to cost peanuts online, I will keep you guys posted. If they don't fit, I'm sure I can use them in other projects eventually.

Thanks for trying Please let me know! It would be awesome if this would work

boggsman wrote on 2024-02-02, 15:27:

The only issue that I see is that it looks like the middle is centered between the two clips. On the ppro it is offset to one side. But maybe the surface is large enough to cover the whole CPU.

I wonder if it is centered over the core or the cache then? Hopefully the core

To me does not look anywhere big enough core area to cover even 1/2 core and 1/2 cache, you want at least 2" diameter core (if round) to cover both. The lid is 2.25" long.....
refer to the pictures from Intel

Here is with a 2" diameter core, assuming the Intel dimensional is accurate (the gold lid "heat spreader" is 2.25" long)....

Probably close enough. I know those cpus made a little more heat than socket 7 cpus did. But not a whole lot more. I gotta think that as long as the mechanics of it all are stable that it should work thermally. The cache probably doesn’t make a whole lot of heat if much of any at all.

If it was a copper core and not aluminum would be more inclined to think it may be ok. Oh and the 1Mb cache versions make lots more heat than Intel Pentiums. 44watt TDP versus 16watt for Pentium 200 MMX. just a comparison....