Assembly:
The upper panel of a G5 powermac (when hdd bays and fans are removed) is exactly the right size for mounting the PSU. I used 5 double sided sticky pads on the bottom of the PSU to stick it to the bottom of the panel so it would not slip around. Make sure the power switch is set to "on" and plug in a power cable and route it down the back of the panel.
Fit a normal DVD drive and make sure there is a power plug ready for it. Route the rest of the power cables / ATX plugs through a convenient hole at the rear of the DVD drive.
As the cable is routed behind the motherboard tray all you need to do now is re-attach the door latching mechanism and fix back the top tray to the chassis.
Fix back the clear perspex latch to the top tray and make sure it fits properly. Now the chassis resembles a PC more and rest is pretty much as a normal PC build.
Drill and fix the motherboard tray to the internal 2 stand offs we left and screw the back panel to the chassis making sure nothing moves around.
Cut out and fit a chassis plug to the rear panel and fix it in place.
Wire up the chassis plug to the PSU plug cable and make sure its covered with insulation or a purpose made rubber boot which will stop you getting electrocuted, it is the most dangerous part in the case so pay special attention here!
I wired the front panel connectors USB/Firewire/Audio/Power button and LED up to several accessory cables I had around which had normal PC fittings to attach to the motherboard, shrink rapped them and covered the bundle in black braiding.
Fit the motherboard/processor/ram/graphics etc.. and find a good place to fix down a HDD (I used a 3.5" adapter tray from an Antec 900)
I replaced the Apple rear fan with a MUCH quieter YS-tech 80mm fan which also moved a lot more air.
Next up is cooling, I used the front fan inserts from an Antec 900 and attached Scythe HDD stabalizer rubber mounts to them and then drilled and fixed them to the perspex cover.
Braided the fan cables which are nice and long and plugged them into the the motherboard.
Attached the perspex cover back to the case and forget about cooling problems
Welcome to the wind tunnel
The fans are controlled by the motherboard temperature sensors.
Case side back on and locked into place.
Plug it in a test everything works!
