On the inside
Now that we've had our tour of the outside of the box, let's switch our attention to the guts. Unscrew the three thumbscrews on the back and the cover slides slightly back and then straight up and off. Once that's done, things look like this:

Most prominent here is the drive tray, which holds two 3.5" devices (one hidden, the other either hidden or visible from the front) and one 5.25" device (visible from the front). Two screws hold the drive tray in position. Remove these and then slide the tray back, up, and out. The front panels are held in place by two screws. Once the panels are removed, you can install an optical drive and/or floppy drive into the tray, as well as a hard drive in the bottom slot.

With the drive tray removed, you can see a lot more of the SB61G2's internals. On the far left is the shroud for the cooling fan, and if you look closely, you can see the heatpipes that connect the radiator under the shroud to the CPU heatsink. Directly below the CPU heatsink in the picture is the PCI slot and the 8X AGP slot. To the right of the CPU heatsink is the north bridge heatsink, which is actively cooled, hopefully ensuring stability when overclocking. Farther right are the two DIMM sockets supporting a maximum of 2GB of memory, and to the right of them you can see an IDE connector which is partially obscured by cables. The other IDE connector is directly below it, and is completely obscured by cables.

I want to give special attention to the north bridge heatsink, because the overhead shot really doesn't do it justice. Many manufacturers will use a fan on top of their north bridge heatsink so they can get away with using a too-small heatsink. As you can see here, however, Shuttle didn't go this route. The north bridge heatsink on the SB61G2 is nice and tall with a good amount of surface area. We'll put it to the test later in the overclocking section, but I suspected that it was going to do well before I even powered the thing on.

Hidden under the case rails in the larger picture are the Serial ATA connectors and the CMOS clear jumper. Using the larger picture as reference, these are situated below and to the right of the south bridge chip (which is directly under the north bridge in the large photo). I thought these connectors were worth special mention, because as you can see from the photo, they're situated right on the edge of the motherboard. This placement makes them very easy to access, which is always a good thing, especially in a CMOS clear jumper. Overclockers know that in the process of arriving at the proper mix of bus speed, voltage, etc. you will reach for the CMOS clear jumper on any number of occasions. Few boards have it in as easy a place as this one.

The CPU heatsink is the same gorgeous, shiny, copper-base unit found in the SB52G2. Here are some gratuitous pics of it and the clip, which as I've said previously is the best Pentium 4 heatsink clip I've ever run across: