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BIOS
Shuttle AN50R uses the familiar Phoenix-AwardBIOS. Menus and layout are easy to use and navigate so most settings can be found and adjusted easily.
Advanced Chipset Features
Chipset and processor settings can be found behind Advanced Chipset Features. Processor clock speed can be manipulated only by adjusting FSB. For some reason there is no processor multiplier adjustments. AGP clock speed is also fully adjustable but on 66MHz default setting it is not locked. If you want to lock AGP and PCI clocks, it is only possible by setting AGP clock to some other setting than 66MHz. Adjusting LDT bus speed is as easy as other adjustments.
DRAM Configuration
Newest BIOS provides also memory latency settings. On Shuttle AN50R Athlon 64 memory controller doesnt like to work very well if CAS 2 setting is used and it also uses Command Rate 2T instead of 1T, which is more common. Memory multiplier setting is quite a bit more complicated than on Athlon XP or Pentium 4 motherboards. Memory divider depends also on processor multiplier and clock speed.
Voltage Control
Voltage Control
Voltage adjustments are comprehensive. Most voltages from processor Vcore to LDT voltage are fully adjustable. Its just too bad that most cases ranges are too narrow and serious overclockers need to do some voltage modifications to achieve high enough voltages.
PC Health Status
PC Health Status monitors most important voltages and also memory voltage. Processor temperature monitor shows high temperature, as it should, very nice. With air cooling it easily reports as high as 75C and with water-cooling over 60C. There is also additional temperature sensor near power circuitry.
Shuttle AN50R BIOS provides quite comprehensive adjustments, but some there is still room for some improvements. Especially lack of a processor multiplier adjustment and quite low maximum voltages for memory and processor need fix.
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