BIOS
Shuttle continues to use a modified Phoenix Award BIOS. Remember that the SD11G5 is designed with low power and low noise in mind.
These are the only two options present under the frequency control section. CPU clock speeds are dictated by which processor is used. With the FD11 motherboard set to auto via a couple of jumpers, the options are limited to 100-132MHz for S479 CPUs that natively run off 100MHz FSB. The newer iteration that run of 133MHz FSB can be set to, you've guessed it, 133MHz-165MHz. There's no voltage manipulation available on any line, though. Certainly not a BIOS that caters for the enthusiast.
Looking under the advanced chipset features, however, does highlight the decent degree of RAM timings adjustment on offer. RAM frequency can be set to either 400MHz or 533MHz. No voltage changes means that your chosen DRAM must run at the preset frequencies at ~1.8V. Onboard graphics dynamically take bandwidth from the system's memory. The Intel GMA 900 is a generation behind the present GMA 950, which isn't exactly fast in terms of 3D rendering, so don't expect to play DOOM 3 at 1024x768.
Shuttle provides a number of fan-speed options, ranging from ultra-low (800RPM), low (1,000RPM), mid (1,700RPM) through to full (3,000RPM). Both ultra-low and low settings were inaudible from 3 feet away, and the ultra-low's 800RPM fan speed was more than enough to keep a Pentium M 770 hovering around 45c when under full load. If it's power and quietness that you hanker for, the SD11G5 makes a strong case.
