Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: cantido on June 01, 2008, 06:31:04 PM
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Well, I offered up my bppc here and people gave some really lowball offers... so I thought I'd hook it up and see if the old beasty still worked. As I expected it works perfectly, so really glad I didn't sell it for ~50 quid.
Now, the problem I have is that inside the desktop case without the top lid it gets hot enough to burn the skin off of your fingers. I ran the amidog port of darcnes with supermario for about 10 hours to fully test the ppc. It didnt crash but there was a funny burning plastic smell. The trapdoor cover I think....
What ways have you guys come up with for cooling a bppc in a desktop case? I was thinking of making a copper piece that mounts over both the ppc and 040, with a tail that comes up and out of the trapdoor (under the number pad on the keyboard) and then mounting a peltier on the tail piece... but that's a bit extreme if there is an easier way to keep the temp down.
Suggestions on the back of a postcard...
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The main problem is the very low airflow on horizontal PCBs. If you can generate some flow with a fan and some ducting, temperature will be much lower.
A Peltier will only shift the problem towards it - you'd have to cool it instead.
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I replaced the stock 5v fan with a deeper 12v fan.. and sealed some of the edges of the ppc sink so that the air gets pushed along the sink instead of exiting out the gap near the connector. That made some difference but it's still too hot to consider putting the lid back on. :/
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I am currently building an A1200 with a BPPC 175/060 and BVision in the desktop case with 256 megs of ram. I am also interested in cooling solutions. I was thinking about a Nidec Gamma series;
Nidec Gamma 26 (http://www.nidec.com/gamma26/gamma26.htm)
Nidec Gamma 28 (http://www.nidec.com/gamma28/gamma28.htm)
Nidec Gamma 30 (http://www.nidec.com/gamma30g2/gamma30g2.htm)
mounted in the left rear corner (where some people put a laptop cd-rom) and some custom duct work from the fan to the BVision and BPPC. I have a Gamma 30 and while it's a little large for the 1200 it moves more than enough air to keep the whole system cool and it's nice and quiet. Any thoughts on how to make or route the ducting?
-Jeff
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@Jeff
Those look interesting. I'm not sure how you would get the air in around the card itself. You have the advantage that you have an 060. The 040 I have runs very hot itself and then it's coupled with a 240mhz ppc.
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I had the 040 replaced with a 060 mostly for that reason. I am testing temperatures as the next step. You would have to make some custom duct work to move the air where it's needed from the square output of the fan.
-Jeff
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this is what iv done.
http://www.amiga.org/gallery/index.php?n=2314=10
and here
http://www.amiga.org/gallery/index.php?n=2321=10
and here old projects( PPC fan )you have to cut into the old PPC heatsink
http://www.amiga.org/gallery/index.php?n=1858=10
and dont forget this ( very important )
http://www.amiga.org/gallery/index.php?n=1722=10
**all modification at your own risk**