Removinum the aluminum
There I go with the non-words again. Anyway, once you remove the three thumbscrews that secure the cover, you can slide it back and pull it off, leaving you with a view similar to the following.

Looking down into the EY855-II, you can see the drive bays on the right and the power supply on the left, with an empty area in between that's open all the way down to the motherboard. Note the curved tracks in the bottom of the drive tray. Removing the two screws that secure the drive tray to the outside rails of the enclosure allows it to slide back and lift out. Next up is a close-up shot of the tray itself.

You can see that there are two sections to the tray. The top section runs front-to-back and houses the two external drive bays (one 5.25" and one 3.5"). The bottom section runs side-to-side and holds the 3.5" internal drive bay. Look closely, and you can see a thumbscrew above the bottom bay. By removing this screw, you can slide the internal drive tray out the side of the system without removing the top tray.

This is where the aforementioned curved tracks come in. Without them, the front edge of the chassis would interfere with the drive tray and keep it from coming out. Thanks to the curved tracks, however, the tray pivots slightly towards the back of the case on the way out, letting it clear the front of the system.

Here's a close-up of the eject mechanism for the optical drive. The flat square piece slides back and forth on the notched track to line up with the eject button on the optical drive. In my experience, however, this piece was a bit too flat. Even after experimenting quite a bit with the placement of this piece, the pressure required to push the optical drive's eject button was much higher than it should have been.

How high was it? Well, if I used a single finger to push the button, the system would start sliding backward on the table before the pressure got high enough to activate the eject button on the optical drive. I suspect that having a more pointed surface to contact the drive eject button would solve this problem.

Removing the tray gives us a much better view of the motherboard. In the center are the processor socket and north bridge, with the two DIMM sockets closer to the front of the case. Along the front edge of the motherboard, one can see the main power connector and the two ATA/100 ports. Below the processor socket in the picture are the PCI and AGP slots.

A better shot of the expansion slots. Unfortunately, the AGP card is on the outside, so double-wide video cards need not apply.

Here's a close-up of the rather imposing north bridge heatsink. The good thing about such a large heatsink is that it doesn't need a fan. Right next to it is the heatsink bracket, which looks like the one you'd find on a Northwood P4 motherboard because, well, it is the one you'd find on a Northwood P4 motherboard.

So what can you say about the heatsink that fills this rather large area? Well, it's happy...

... and it's big, especially for a processor designed to fit in a sliver of a notebook. Below is another picture of it, this time with the CPU heatsink from the DFI Pentium M motherboard stacked on top of it.

Like Arnold to a Democrat, you can practically hear it calling the DFI heatsink a girly-man. The key advantage of the heatsink's size, however, is that it lets AOpen use a larger fan that can spin slower and quieter while still keeping the processor cool.