BIOS
Despite being based on a small form-factor design, the Shuttle SD37P2's BIOS is similar to most midrange motherboards'.
Interestingly, the BIOS' maximum memory support is DDR2-667. Shuttle, though, has chosen to run with reasonably tight timings and a DDR2-533 speed. The list of voltage and speed adjustments are shown in the table below:
| Item | Adjustment |
|---|---|
| CPU bus frequency | 133MHz to 355MHz in 1MHz steps for 266MHz FSB CPUs |
| DRAM frequency/multis | DDR2 533/667 |
| CPU voltage | Default + 0.8V in 0.025V increments |
| DRAM voltage | Default +0.3V in 0.1V increments |
| PCI Express frequency | N/A |
| i975X MCH voltage | N/A |
| FSB voltage | N/A |
| ICH7R voltage | N/A |
| CPU boot FID adjust | Yes; depends on CPU |
| CPU boot VID adjust | No |
| Intel Speedstep Control/EIST | No |
Not the most comprehensive, but both DDR2 and CPU voltage can be tuned.
The BIOS reports a decent number of parameters, and we've already spoken about the benefits of being able to control the speed of the system's fans. Speeds range from ultra-low, low, mid, full, and Extreme PC mode. The low setting is enough to keep the Core 2 Extreme X6800 CPU ticking along without overheating.
