Here's how it was done:
First obstacle is to get the mobo into the case. Luckily the Dell Dimension 4500 uses a standard mATX format. Nonetheless, I still had to prep the mobo tray to accept its new master. First to go were the standoffs used to hold down the Dell cpu bracket.
The mobo tray also had some small tabs bent up (at the ends of the scissors). Those will have to go.
The last part is to cut off the I/O panel from the system tray. Here it is.
Here's the finished product. Ready to accept a new mATX board. What's really nice about this, is that I can remove the motherboard without ever having to loosen a screw. The tray just slides in and locks in place.
Up next is the fan mod I thought up. The case is cramped, and wires will be right next to the cpu fan. Without a shroud around that fan, there's a serious risk for the wiring to get caught in the fan. Besides, fans are more efficient with a shroud around them. All I needed was to find some sort of material that would make for a good shroud. Bingo:
I'm not a big fan of those things, but my wife likes 'em. Here's the finished product:
Here's the temps. Before that mod, the cpu temp was 38C, with the case open. The only change was the shroud. A drop of 3C is very nice to see.
Here's a couple shots of the mobo and cpu sitting in their new home:
Alright. Now all that's left is to figure out how to hook up the front panel wiring. This Dell Dimension 4500 uses a way too complicated system for running the front audio and USB ports, not to mention the power button and LEDs. Here's the front power switch and LED board I have to work with:
It's nice to see that each thing was clearly marked on the front. This made identification easier:
Simple solution was to just solder some wire on the back of the circuit board. It's a bad pick, but it give you an idea.
The other end that connects to the motherboard uses the plug and wiring from a USB header:
As for the front USB and audio ports, I decided to completely do away with Dell's convoluted system, and instead used a front USB/audio/Mic circuit board that I scavenged off a cheap case someone had thrown away some time ago. I little bit of Dremeling and a butt load of hot glue (black of course) later, and I have my front USB and audio ports using conventional mobo connectors.
Here's a crappy pic showing how it looks from the front:
Up and running pic. Yes, that VCR is hooked up the computer.
Now I just have to finish hooking up all the peripherals and their drivers. I should be done by tonight.
Cheers!