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BIOS and Overclocking

X48 Motherboard Comparison, Part 2
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BIOS Frequency and Voltage settings (for overclocking)
FSB Frequency 200 - 700 MHz (1 MHz)
Clock Multiplier Adjustment Yes
DRAM Frequency All Intel Ratios (by boot strap)
PCIe Clock 100 - 250MHz (1 MHz)
CPU Vcore 0.44375 - 1.6000 Volts (0.00625 Volts)
CPU FSB Voltage 1.211 - 1.601 Volts (0.005 Volts)
Northbridge (MCH) 1.211 - 1.601 Volts (0.005 Volts)
Southbridge (ICH) 1.51 - 2.38 Volts (0.13 Volts)
DRAM Voltage 1.71 - 3.04 Volts (Various Steps)
CAS Latency Range tCAS: 3-9; tRCD: 3-10; tRP: 3-9; tRAS: 1-31

DFI provides an excellent range of voltage and timing adjustments in small increments, allowing each overclocker to shoot for the best possible performance his or her components can achieve. The CPU core voltage range does look a little conservative compared to other settings, but DFI also provides a “CPU VID Add” setting to increase the core up to 30% beyond the set voltage, in 0.23% increments.

x48 motherboard comparison

DFI calls its overclocking menus “Genie BIOS.” The main menu includes basic clock and ratio settings for the CPU and RAM.

x48 motherboard comparison

The voltage submenu includes VID control, the previously mentioned “VID Add” percentage; DRAM, chipset and per-die GTL reference voltage settings.

x48 motherboard comparison

The DRAM timings menu has every setting that even the most avid overclocker could want, and those less interested in the more advanced settings will find individual “automatic” options.

x48 motherboard comparison

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