A3640 Cooler for A3000D

[fordp]

I'm looking for recommendations for a low-profile heatsink & fan to use on my A3640 mounted in an Amiga 3000D. I had intended to use a 486 CPU Heatsink & Fan such as this one, as I thought I had read that others have use similar models, but upon testing it I found that it is to tall. I've also seen recommendations for chipset, and vga coolers, but I figure that one of you might know of a specific working option for me, as I'd prefer not to play musical heatsinks.

Thanks!

[danbeaver]

Do you really think you need a fan?  They only shipped with an Aluminium heat sink, although some were wider than others.

[Oldsmobile_Mike]

Do you really think you need a fan?  They only shipped with an Aluminium heat sink, although some were wider than others.

IMHO if I owned an A3640 in an A3000 desktop case, I'd want to throw on as much additional cooling as possible, in whatever way possible.


Disclaimer:  I own neither of these pieces of equipment, just been reading about them for about the past 25 years or so. :roflmao:

[danbeaver]

Well, in lieu of submersion of your A3000 in liquid nitrogen, if you really believe that the 68040 was not meant to run hot to the touch, then you can "hot glue" the edges of this to the CPU http://www.newegg.com/Product/Product.aspx?Item=N82E16835119079

My experience with the A3000 is that they looked fantastic but the insides were designed by a Commodore executive and not a engineer.

[danbeaver]

Also don't forget the thermal paste between the two, it works better than flour and water that was the old Commodore standard.

[Oldsmobile_Mike]

Also don't forget the thermal paste between the two, it works better than flour and water that was the old Commodore standard.

I want to ask if you're joking but I almost suspect that you're not.  :lol:

[danbeaver]

If you ever pried the heat sink off, then what you find between it and the CPU is a hard, dried, flaky ex-paste; nothing resembling grease

[Brian]

I'm looking for recommendations for a low-profile heatsink & fan to use on my A3640 mounted in an Amiga 3000D. I had intended to use a 486 CPU Heatsink & Fan such as this one, as I thought I had read that others have use similar models, but upon testing it I found that it is to tall. I've also seen recommendations for chipset, and vga coolers, but I figure that one of you might know of a specific working option for me, as I'd prefer not to play musical heatsinks.

Thanks!

I don't remember exactly high limit for the heatsink and don't own an A3000 any longer to check so I can only give suggestions. Depending on space you could try a slim CPU heatsink such as ID-COOLING IS-25i (could possible modify the mount to hold the heatsink but 25mm high) but a VGA cooler (15mm high) fastened with thermal adhesive could also do it.

[fordp]

Do you really think you need a fan?  They only shipped with an Aluminium heat sink, although some were wider than others.

After reading multiple posts around here, eab, and amibay, yes. Especially considering that I have an original XC68040 in the thing, and that it was never actually a reccomended Amiga 3000 upgrade. I'm far more comfortable to err on the side of caution.

IMHO if I owned an A3640 in an A3000 desktop case, I'd want to throw on as much additional cooling as possible, in whatever way possible.

This exactly.

Well, in lieu of submersion of your A3000 in liquid nitrogen, if you really believe that the 68040 was not meant to run hot to the touch, then you can "hot glue" the edges of this to the CPU http://www.newegg.com/Product/Product.aspx?Item=N82E16835119079

My experience with the A3000 is that they looked fantastic but the insides were designed by a Commodore executive and not a engineer.

I've always wanted to mount a machine in a mini-fridge....but no. That fan might work spot-on, Claims to be 10mm, the 486 cooler is 18mm, and doesn't fit. Certainly worth a try. thanks!

As for the case. Having opened and closed it many times the past few weeks. I certain think it was made for appearance, and not functionality. (Which is also leads to the cooling issue...)

[fordp]

If you ever pried the heat sink off, then what you find between it and the CPU is a hard, dried, flaky ex-paste; nothing resembling grease

Back when I was first learning some basic electronics, the thermal grease we used for voltage regulators, and opamps did this relatively quickly. It still worked, but certainly not as well as the modern stuff. As I recall, it was also far messier to apply. I should have some Artic Silver around here, that is over-kill for this job I'm sure, but on-hand is nice.

[fordp]

I don't remember exactly high limit for the heatsink and don't own an A3000 any longer to check so I can only give suggestions. Depending on space you could try a slim CPU heatsink such as ID-COOLING IS-25i (could possible modify the mount to hold the heatsink but 25mm high) but a VGA cooler (15mm high) fastened with thermal adhesive could also do it.

Thanks, 25mm is far to tall, The VGA cooler was 18mm and is to tall. The 15mm call might cut it. I may end up just buying both that, and the one danbeaver suggested and hedge my bets.

[danbeaver]

You are aware that the PSU's fan is all there is moving cool air in and then out, so replacing this with one that is far more efficient in moving air will let the case actually have cool air for the CPU to use.

Odd that there would be an accelerator card interface, a working accelerator card, stand-off posts and a CPU heat sink designed to fit the A3000 if "it was never actually a reccomended Amiga 3000 upgrade"

C'est la vie!

[Jeff]

It looks like may be 2 different versions of the A3640 heatsink. One version is low profile and fits fine in the A3000D.

Here are some pictures of mine.
http://www.amhttp://www.amiga.org/forums/attachment.php?attachmentid=4190&stc=1&d=1432499387iga.org/forums/attachment.php?attachmentid=4189&stc=1&d=1432499387

[danbeaver]

Th one on the left with the larger heat sink allows the sink to rotate 90 degrees and fit an A4000D

[Brian]

You could also get something like a bigger or smaller untraditional heatsink, by replace the fan with a soft thermalpad the heatsinks design with a solid center would act like a shim and on contact with the A3000D drivecage allow for it to work as part of the heatsink aswell.