On Fri, 2005-09-09 at 13:34 -0400, Timothy Miller wrote: > Let's focus on passive cooling for the moment.
Well, from my experiences there are a few things that help the airflow even in very cramped cases. As we know, hot air rises, but only if it can be replaced by cold air. Thus some cards actually have cut out a piece of the pcb to allow air to come through from the other side. I have seen both large cut-pot parts below the vga connector as well as several smaller cut-out parts in various places on the card. Since we will have two DVI connectors, the large cut-out space might not be available, but a few mm cut off on the lower end might be possible. Actually the whole card could be cut a little extra on the lower end (except on the pci connector of course) to allow both airflow from under the card and better clearance to motherboard components. The metal shim at the end of the card might also have space some venting holes. If I remember correctly, some cards have 2xDVI + s-video plugs. If we only need 2xDVI then they can be located as far up (away from the motherboard) as possible. This allows for venting holes/strips on the shim, aswell as some pcb cutoff. As an alternative to active cooling it could be worth considering a heatpipe solution where the main heatsink is located on a pice of pcb where no components are located. Thus allowing a thicker heatsink. I know this is more expensive than plain passive, but it is more reliable than active. PS: will there be 5/12V fan headers onboard? -HK _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
