Lombard heat sink substitute?

[Phipli]

I have a 333 mhz Lombard that was running hot. The fan ram all the time.
I had some arctic silver cpu paste and a very thin sheet of copper at hand, so I removed the old pad on the heat sink and “glued” three or four carefully cut strips of the sheeting together with the arctic silver.
I put a dab of the silver on the cpu and placed the frankensteined heat sink on top, screwed it all in and fired it up. The fan stopped constantly running. It was a nice result for a sudden case of “what if I did this instead?”

Glad it worked, but if something similar crops up, be aware that metal->paste->metal->paste will have a much higher thermal resistance than just metal. If you can find the right thickness of metal and limit to a single layer of paste, performance will be several times better.

Look up the thermal conductivity of good paste, then look up the thermal conductivity of aluminium. They're worlds apart.

If I had to guess, I'd say your original heatsink wasn't properly in contact, perhaps a part missing or bent.

 

[ppcoutlaw]

Glad it worked, but if something similar crops up, be aware that metal->paste->metal->paste will have a much higher thermal resistance than just metal. If you can find the right thickness of metal and limit to a single layer of paste, performance will be several times better.

Look up the thermal conductivity of good paste, then look up the thermal conductivity of aluminium. They're worlds apart.

If I had to guess, I'd say your original heatsink wasn't properly in contact, perhaps a part missing or bent.

Yeah. It was a recycle unit that I picked up. I suspect that the heat issue may have helped it along to my hands. Ideally, I would have preferred a thicker chunk of copper, but you are very much correct. It has been a bit of an experimental machine for me. It has 9.2.2 and a cribbed 10.4.11-installed from a b&w-no ex post facto used-on a 20gb hdd. It worked fine then stopped turning on one day. I suspect the system battery ate it, but I haven’t had space or time to check it out.

 

[Phipli]

Yeah. It was a recycle unit that I picked up. I suspect that the heat issue may have helped it along to my hands. Ideally, I would have preferred a thicker chunk of copper, but you are very much correct. It has been a bit of an experimental machine for me. It has 9.2.2 and a cribbed 10.4.11-installed from a b&w-no ex post facto used-on a 20gb hdd. It worked fine then stopped turning on one day. I suspect the system battery ate it, but I haven’t had space or time to check it out.

Try leaving it plugged in for 10 minutes before powering on, just in case. It can help with a couple of types of issue.

 

[ppcoutlaw]

Try leaving it plugged in for 10 minutes before powering on, just in case. It can help with a couple of types of issue.

Absolutely will give that a try! I had a bunch of games I liked on it and would like to get it going again. The Lombard is a nice little machine that doesn’t get the love it deserves.

 

[Phipli]

The Lombard is a nice little machine that doesn’t get the love it deserves.

I'd like one as a bridge machine, but I already have a Pismo, so just use that and ethernet or CDRs. I should leave a Beige G3 setup but don't have room.

 

[ppcoutlaw]

I'd like one as a bridge machine, but I already have a Pismo, so just use that and ethernet or CDRs. I should leave a Beige G3 setup but don't have room.

G3 Beiges are great machines to play with. I have one that I setup to play movies on for a short while using the ultra rare Bordeaux card and 6mb of vram. On a 21 inch Sony flat tube screen, running 9.2.1, Star Wars episode 1 looked incredible. It did stutter sometimes, but that was more likely a lack knowlege of how to apply settings on my part.

 

[Phipli]

G3 Beiges are great machines to play with. I have one that I setup to play movies on for a short while using the ultra rare Bordeaux card and 6mb of vram. On a 21 inch Sony flat tube screen, running 9.2.1, Star Wars episode 1 looked incredible. It did stutter sometimes, but that was more likely a lack knowlege of how to apply settings on my part.

Nice I never got my hands on a Bordeaux, but I have a Rage 128 with decoder and a Radeon 7000.

A seller in Germany had 4MB VRAM SODIMMs cheap so I bought some for mine a while back.