Need your input on custom case
I'm trying to build a character LCD based mp3 player for my rig. I'm trying to build it as cheap as possible, because my truck has a removable top and somebody could easily just rip the system out and take it with them. I'm going to put the computer behind a plastic panel in the rear to keep it out of site. I have some scrap plastic that I got from work for free. I am attempting to build a case out of it. It's rather thin. A little bigger than the thickness of a CD-Rom. I'm going to build the top, bottom, and sides out of this plastic. I'm not sure how to mount the mobo on this plastic. I'm worried about it possibly melting the plastic.
Now for the questions. How hot does a mobo really get? Should I be worried? Should I mount the mobo directly to the plastic, with some double sided tape to where the holes for the previous mounting points on the old metal case? Or should I maybe use some sort of risers to let some air circulate under the mobo?
I plan on making the case really shallow. Just deep enough to clear the memory sticks. That is the tallest part of the mobo. But I'm also worried about the processor fan being able to properly breathe. It's a 300mhz K6-2 with a good sized heat sink and fan. (see picture) It will only have a few inches above it to move the air around. I'm also going to add a 3" fan somewhere in the case to move the air out. I'd like to mount the fan on the side of the case, not on top. Do you think mounting the fan on the side and having the case very thin would have adequate ventilation? It will just have a 30 gig HD, no floppy, cd, or any PCI cards. Has built in audio. And I plan on mounting the ATX power supply outside of the case. I might even mount the hard drive outside the case as well, only if I can't get it to fit in the case.
What do you guys think? Let me know, good or bad. Here's a pic of the mobo.