[mythtv-users] Any advice on cooling down my backend

[Edmund]

My myth backend is in a small cupboard with a switch, router and a 
couple of other things. The cupboard is quite warm even though the rest 
of the room is cool. I am concerned that if next summer is hot the 
cupboard might become too hot for the PC.

I am considering removing the graphics card. There is no monitor on the 
PC, but I do connect one from time to time. Mainly when playing with the 
bios. Removing the card will probably mean changing a bios setting 
becomes a real chore. Is there anyway to turn a PCIe card off from the 
command line?

The PC is used as a file server which holds music and backups and other 
stuff so turning it off when myth isn't recording isn't an option, but 
is there any way of underclocking from software? It is an AMD64 x2 chip 
and I think from XP this is possible. I could then underclock it in the 
daytime, when it isn't doing much (and the room is warmer).

I don't want to replace the motherboard at this time, but next time I 
change something I might look at cooler chips.

Any other ideas. (There is no air con in the house.)