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First post, by Rikintosh

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This is the motherboard of a barebone MSI Mega PC 651. Originally it came with its own cooler, but the old one had problems, and the former owner changed it to a socket 939 cooler (or something like that), the adaptation is not good for me, I would like to fix this.

I've seen this holes positioning somewhere, but I don't remember where.

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Reply 2 of 12, by Rikintosh

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I've already looked, it's not the traditional pentium 4 478 fitting

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Reply 3 of 12, by Cuttoon

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oh? ok, thats pretty weird. Sorry.

I really HATE it that no one today provides simple data in mm for these things. I mean, how complex does it get? Two distances, one hole diameter, done.
Something simple and elegant as this:

socket.gif
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or
https://cdn.hw-lab.com/news/intel/2011-lga-11 … a-1155-1156.png
So, it does occur, but way to rarely.

If it's really not p4 measures, lif not 423, looks a bit like the original Socket A mounting, even if that doesn't make much sense.
Could be that MSI wanted to streamline their business and decided to buy the socket A coolers on margin and use them for the Pentium chips as well? That's legal, I assume?

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Reply 4 of 12, by Cuttoon

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Rikintosh wrote on 2022-05-09, 18:48:

Originally it came with its own cooler, but the old one had problems, and the former owner changed it to a socket 939 cooler (or something like that), the adaptation is not good for me, I would like to fix this.

Btw., you will have to excuse the questions
- what "problems" does a heatsink possibly have? Rust?
If anything, the fan had problems, in which case, one replaces the fan. Removing the heatsink and mounting is like recycling the car because of a flat tire.
- what's wrong with the adaptation? Did it cool the thing with the previous owner?

I like jumpers.

Reply 5 of 12, by andrea

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An AM2 bracket could be made to fit maybe?
Or get a heatsink that will overlap the holes (some weird thing from a major OEM would be your best bet I'd guess. I recall Fujitsu used something that could work), drill and tap it and then fit it with some through bolts?

Reply 6 of 12, by Rikintosh

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Btw., you will have to excuse the questions
- what "problems" does a heatsink possibly have? Rust?

I don't know what happened, the previous owner didn't go into details, but personally I would never have done that. Even if there was rust, there are products that remove the rust, and chemical techniques that protect the metal from re-rusting.

If anything, the fan had problems, in which case, one replaces the fan. Removing the heatsink and mounting is like recycling the car because of a flat tire.
- what's wrong with the adaptation? Did it cool the thing with the previous owner?

The new adaptation is basically a cooler (and mounting base) from an AMD 939 or Am2, drilled in a handmade way to match the native holes. This board only accepts "screw system" as these holes line up with "screw holes" in the case itself.

The big problem is that this adaptation only holds one side of the cooler (the other is completely loose), in addition, the clamp that holds the cooler to the socket, touches a large inductor on the board, if by any chance the inductor loses its varnish, there will be a short circuit in the VRM area of the motherboard.

I don't have a tool for the correct measurement, I used a regular ruler, and the measurements are something like 65mm x 35mm
Edit: Additional info, I measured a socket A motherboard, and the dimensions are similar, but socket A is slightly more spaced (as specified in the Cuttoon post image) 66mm x 36mm

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Reply 7 of 12, by Cuttoon

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Interesting, if weird. Former owner had strange ideas about cooling implements, good thing you took that thing out of his hands. 😉

- Whether the screws go into the back of the case or you need some nuts on the back of the motherboard, won't matter much. Will do the job. All you need is some part that will fit both the holes and the heatsink.

Rikintosh wrote on 2022-05-09, 19:34:

I don't have a tool for the correct measurement, I used a regular ruler, and the measurements are something like 65mm x 35mm

Well, what else would you use? I would have calipers. but ruler should do. You realize you don't need to estimate the center of the holes, the corresponding lower edges of any two will do? So, from the back of the board, you should get it down to half a millimeter.
Also, 65 by 35 seems a lot like the measurements for socket A that I posted above? Could that be it?

But, the socket A mounting holes were only optional and computer OEMs being the cheap, hasty bastards that they are, they usually went with the old clip-on brackets that go on the socket itself. Therefore, Socket A hole-mounted coolers are rare. Was mostly used for heavy watercoolers. Would look something like that, on the left:
https://m.media-amazon.com/images/I/51KRmhBvcWL._SL1280_.jpg

If you don't find one, you could alway improvise some aluminium profiles from the hobby store?

I like jumpers.

Reply 8 of 12, by Cuttoon

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OK, read your edit, if they are really a mm off, that's weird AF.

Although, I don't know many heatsink mounting spacings by heart - may still be some normal size.
But, well, MSI makes their own motherboards, they're perfectly capable to make them to their own idiotic proprietary specifications! 😉

I like jumpers.

Reply 9 of 12, by Repo Man11

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Judging from these images, the original cooler is something that should never have been separated from this unit. I'm sure with enough time and effort you'll be able to work something out, but I don't envy you the task.

https://www.tomshardware.com/reviews/mailman- … ved,657-13.html

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Reply 10 of 12, by Rikintosh

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Yes, I think the way is to try to create something with aluminum that fits him. The coolers I have here for 462 are all clip system, I think I saw a 462 only once with this screw system The previous owner removed his beautiful aluminum cover to use acrylic, but he made this acrylic thing using an lcd backlight or something, glued on with hot glue, and it was crap. Anyway I would have to make a new cover for it with aluminum

I'm used to saving these machines from certain death in some landfill or metal recycling center. I will definitely bring it back to his glory days again.

Take a look at my blog: http://rikintosh.blogspot.com
My Youtube channel: https://www.youtube.com/channel/UCfRUbxkBmEihBEkIK32Hilg

Reply 11 of 12, by Cuttoon

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Well, if you do have to improvise, the old arctic freezer might be a good base for that.
It provides heatpipe age cooling, yet is not all too large and heavy. In line with the PSU, it might just fit, maybe you'd have to remove the orginal fan.

They're cheap and available and the old AM2 version offers simple screw holes on both sides that would easily accept some other implement:
https://www.arctic.de/media/5c/51/49/15835056 … r_7_Pro_G05.jpg

What you'd have to build would be two bars fitting the sides and looking somewhat like this:
https://i.ebayimg.com/images/g/fQYAAOSwyx9icOcm/s-l1600.jpg
- Also, that bugger has so many different mounting holes, shouldn't one of them fit?!?

I like jumpers.