I dont think I have ever seen one like in the top picture but the other 2 are quite common and have fit in any of my slot 1 boards retention arms. The ones on your Asus P2B-F (judging from pics on web) look like 2 sets I have but the middle heatsink should work.

Might be best if someone that has the same board chimes in.

I picked up a box of new aftermarket P2/P3 coolers with dual fans a couple years ago so I am set for life.

First one (Foxconn) uses SECC1 retention bracket. Have 2 of those, one on P2B (non F). Can you replace the bracket?

I clumsily broke one of the plastic clips for the second heatsink pictured in my post. It also seemed like those fly-out metal tabs that start towards the middle of the heatsink were too wide to fit into the retention bracket, and I didn't want to force things.

stef80 wrote on 2022-04-19, 20:48:

First one (Foxconn) uses SECC1 retention bracket. Have 2 of those, one on P2B (non F). Can you replace the bracket?

Unfortunately, I do not have a SECC1 retention bracket. I think I'd prefer to find a SECC2 compatible heatsink instead of replacing the bracket.

It looks like I could pick up one of this style cheaply:

Does this seem like it would fit in a SECC2 bracket?

mrzmaster wrote on 2022-04-19, 19:58:

Hey all, I'm currently working on a slot 1 build and am trying to figure out a decent cooling solution. The SECC2 PIII processor […]
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Hey all, I'm currently working on a slot 1 build and am trying to figure out a decent cooling solution. The SECC2 PIII processor I bought came with a Coolermaster heatsink and fan, although the fan has failed. I like the idea of using a huge passive heatsink, so I scooped up two different ones. To my disappointment, neither of them appear to fit in the retention bracket on my Asus P2B-F:

IMG_4331.jpeg

IMG_4329.jpeg

My suspicion is that these heatsinks were from a proprietary board/system.

This leaves me with the options of either finding a passive heatsink that is compatible with my motherboard's retention bracket or attaching a new fan to the Coolermaster heatsink:

IMG_4332.jpeg

I'm considering getting a 40 or 50mm Noctua fan to attach to it, but that might be tricky due to the fact that all of their fans use standard case fan screws. I still like the idea of finding a nice, big, passive heatsink but need to know what to look for to ensure it will fit. Any suggestions would be appreciated, thanks!

The motherboard retention brackets for Slot 1 can be changed.

i don't think there is any truly passive heatsinks for slot 1. OEMs like dell compaq ect back then would put on very large heatsinks but they would put there fan in the back of the case and use a plastic shroud that would direct the air over the cpu and out the back.

i would just take the current heatsink u got put a nice noctua or nosieblocker fan on it.

Went the cheaper route with regular F8 Arctic 😁. Fits nice on Foxconn heatsink.

Got heatsinks with Compaq branded P2s.

aaron158 wrote on 2022-04-19, 21:25:

i don't think there is any truly passive heatsinks for slot 1. OEMs like dell compaq ect back then would put on very large heatsinks but they would put there fan in the back of the case and use a plastic shroud that would direct the air over the cpu and out the back.

I believe the ATX standard actually suggested that the PSU fan should do (or help) the CPU cooling.
Which I believe is one of the reasons the CPU is positioned where it is on ATX boards.

It's a slot system. You're supposed to deal with the heatsink at hand and cool that with a 40 mm fan with 7,000 RPM or else, you're trying to play GOD and need to be burnt.

The really huge heatsinks without a fan were most likely all included with OEM systems and supposed to work exclusively with that very setup and one of two ways:
-There's a 80mm+ fan right behind the heatsink on the case shell, blowing right at or sucking right off that heatsink, so bascially a 80 mm fan on the slot heatsink.
-There's a weird funnel or channel of a plastic box around that headsink, channeling the air around it directly through the PSU and out of the case. In conjunction with a temp controlled PSU cooling, that will allow for a rather low noise overall system, beating all those non-OEM generic builds that will have to cool every component self-sufficient and gratuitous to avoid all kinds of RMA hazards.

Proprietary mechanical arrangements like fan mounts or funnels are a liability for any component manufacturer, but a virtue for any OEM: The system is not supposed to be scalable in any way, or expandable or easy to upgrade.

Long story short, with retro, make up your mind:

- Elegant and authentic: Whats wrong wit a 7000 RPM micro turbine? Not like we have any workplace regulation against that? Yet?
- Silent and effective: Things like mounting screws don't even qualify as an actual problem. You want a modern 120 mm fan to blow in the right direction. Somehow get it to do so. Hot glue, zip ties, weird cantilever constructions, Siemens air hooks: All fair in love and war.

Cuttoon wrote on 2022-04-20, 23:23:

The really huge heatsinks without a fan were most likely all included with OEM systems and supposed to work exclusively with tha […]
Show full quote

The really huge heatsinks without a fan were most likely all included with OEM systems and supposed to work exclusively with that very setup and one of two ways:
-There's a 80mm+ fan right behind the heatsink on the case shell, blowing right at or sucking right off that heatsink, so bascially a 80 mm fan on the slot heatsink.
-There's a weird funnel or channel of a plastic box around that headsink, channeling the air around it directly through the PSU and out of the case. In conjunction with a temp controlled PSU cooling, that will allow for a rather low noise overall system, beating all those non-OEM generic builds that will have to cool every component self-sufficient and gratuitous to avoid all kinds of RMA hazards.

Proprietary mechanical arrangements like fan mounts or funnels are a liability for any component manufacturer, but a virtue for any OEM: The system is not supposed to be scalable in any way, or expandable or easy to upgrade.

Correct. The really huge heatsinks seemed to be always OEMs. Usually passive (or 'passive' or however one might want to call it. The physical CPU heatsink itself is not active anyway) with a fan duct channeling the air through the PSU or through the back exhaust case fan.
Often I found it hard to remove these heatsinks from the CPUs without breaking anything. Seemed to me like there were meant to never be disassembled. Shame really, I really like at least some of the huge heatsink designs.

It's a slot system. You're supposed to deal with the heatsink at hand and cool that with a 40 mm fan with 7,000 RPM or else, you […]
Show full quote

It's a slot system. You're supposed to deal with the heatsink at hand and cool that with a 40 mm fan with 7,000 RPM or else, you're trying to play GOD and need to be burnt.

Long story short, with retro, make up your mind:

- Elegant and authentic: Whats wrong wit a 7000 RPM micro turbine? Not like we have any workplace regulation against that? Yet?
- Silent and effective: Things like mounting screws don't even qualify as an actual problem. You want a modern 120 mm fan to blow in the right direction. Somehow get it to do so. Hot glue, zip ties, weird cantilever constructions, Siemens air hooks: All fair in love and war.

I'm not sure what you're trying to convey here, but at first glance it seems like it is almost some sort of rant.

What I did was to replace the standard HSF of my Slot 1 with one with 2 fans and then replace both these fans with more silent ones. It worked perfectly fine this way, or as you'd put it, it was elegant, authentic, silent and effective 😎. And simple.
It's not all black or white, there are middle roads to be found.
Yes, some creativity is often solicited and can be very effective 😜
And yes, sometimes it does look ugly. 🤣

Seemed to work well enough on the AP550 with dual 1GHz alu 'passive' blocks and only a 90mm fan for company (no duct & no direct PSU fan air draw)

Tetrium wrote on 2022-04-21, 10:53:

I'm not sure what you're trying to convey here, but at first glance it seems like it is almost some sort of rant.

Pretty much the same as you wrote: Some are actually hard to disassemble without destroying them. That's basically a rare case of actual, mileage-based "planned obsolescence" in a PC system, as fans simply do not last forever. And it's not even made by Apple!

OK, yes, from a pure practical viewpoint, I do not care much for slot systems.

I was mainly trying to explain to the OP that it's normal to get creative with those things and the mounting of a replacement fan should not put them off.
But you're right - the double fan arrangement with replacement fans might be the one solution that's at least optically authentic and quiet, since low noise + low noise does not add up to a higher noise level, like that of a faster fan. Good idea, if you can find one.

Cuttoon wrote on 2022-04-21, 12:04:

Pretty much the same as you wrote: Some are actually hard to disassemble without destroying them. That's basically a rare case o […]
Show full quote

Tetrium wrote on 2022-04-21, 10:53:

I'm not sure what you're trying to convey here, but at first glance it seems like it is almost some sort of rant.

Pretty much the same as you wrote: Some are actually hard to disassemble without destroying them. That's basically a rare case of actual, mileage-based "planned obsolescence" in a PC system, as fans simply do not last forever. And it's not even made by Apple!

OK, yes, from a pure practical viewpoint, I do not care much for slot systems.

I was mainly trying to explain to the OP that it's normal to get creative with those things and the mounting of a replacement fan should not put them off.
But you're right - the double fan arrangement with replacement fans might be the one solution that's at least optically authentic and quiet, since low noise + low noise does not add up to a higher noise level, like that of a faster fan. Good idea, if you can find one.

Well, another optically authentic and quiet solution could be to use a slotket and add an AthlonXP HSF. Should be even quieter and originally slotkets were also a thing so it's still authentic.
2 low noise fans do add up to a higher noise level, but it's still quieter than the 2 fans that got replaced.

PC Hoarder Patrol wrote on 2022-04-21, 12:01:

Seemed to work well enough on the AP550 with dual 1GHz alu 'passive' blocks and only a 90mm fan for company (no duct & no direct PSU fan air draw)

Compaq AP550 Wkstn Cooling.jpg

What kind of CPU cooler is that? 😮

Tetrium wrote on 2022-04-21, 14:57:

PC Hoarder Patrol wrote on 2022-04-21, 12:01:

Seemed to work well enough on the AP550 with dual 1GHz alu 'passive' blocks and only a 90mm fan for company (no duct & no direct PSU fan air draw)

Compaq AP550 Wkstn Cooling.jpg

What kind of CPU cooler is that? 😮

Its the standard passive cooler (pictured) that Compaq shipped with the 1GHz processor models (the 866MHz & below versions used slightly smaller ones - less fins)

PC Hoarder Patrol wrote on 2022-04-22, 02:28:

Tetrium wrote on 2022-04-21, 14:57:

PC Hoarder Patrol wrote on 2022-04-21, 12:01:

Seemed to work well enough on the AP550 with dual 1GHz alu 'passive' blocks and only a 90mm fan for company (no duct & no direct PSU fan air draw)

Compaq AP550 Wkstn Cooling.jpg

What kind of CPU cooler is that? 😮

Its the standard passive cooler (pictured) that Compaq shipped with the 1GHz processor models (the 866MHz & below versions used slightly smaller ones - less fins)

AP550 1GHz Passive Cooler.jpg

Those look awesome!
I have one such heatsink but iirc it's the smaller one. I'd say these are as good as they get xD

Update: thanks everyone for the suggestions and examples! I have a SECC2 heatsink now and I'm going to try to jerry rig a 80mm Noctua fan onto it, and I may have another option for a more proper heatsink/fan (third-party dual fan) on the way as well.