BIOS options
Shuttle has all but perfected the small form factor chassis with the SD39P2, but can the BIOS deliver as well?

Not so much.

The BIOS is certainly well organized, with all the overclocking and tweaking options available on a single page. But they only all fit on one page because there's relatively few of them.

Front-side bus speed options are only available up to 400MHz, which isn't a good sign for those looking to really push a Core 2 Duo. Memory bus speed options are limited to 533, 667, and 800MHz, as well. At least you're able to lock the PCI Express clock to 100MHz.

Things don't get any better on the voltage front, where you can only increase the CPU voltage by up to 0.8V. DRAM voltages are available up to 2.4V, but only in 0.2V increments. Chipset voltages, on the other hand, are nowhere to be found.

So the SD39P2's BIOS isn't well-equipped for overclocking. Shuttle does, however, provide a decent amount of control over the system fan speeds and even the brightness of the blue power-on LED.

Users are presented with four different system fan profiles and a whopping six fan profiles for the CPU cooler, including an unfortunately-named "eXtreme PC" mode. However, the BIOS doesn't allow users to define fan speed profiles and target temperatures on their own. That functionality is only available through Shuttle's XPC Tools Windows software, but it doesn't yet support the SD39P2. Shuttle says a new version of XPC Tools with SD39P2 support should be ready in a few weeks.