Sandy Bridge, Part 3: Gigabyte P67A-UD4 & Intel DP67BG P67 Motherboards

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Intel DP67BG: Physical Details

The Intel DP67BG is a very similar board with more or less the same layout as the P67A-UD4. It is quite a bit flashier though, with blue LEDs lighting up the physical power/reset buttons and illuminating the PCH heatsink and a skull outline acting as a power and hard drive activity monitor. There are also a series of diagnostic LEDs at the bottom edge of the board and a POST code LED display, both of which light up bright yellow. This is not a board for epileptics.

The DP67BG has the same assortment of PCI/PCI-E slots, but they are laid out in a more staggered pattern. There are four 4-pin fan headers in total (easily identified by their red color) scattered about the PCB.

Like the P67A-UD4, the board's six internal SATA ports sit on their side, but the various headers on the board do not have exterior housings. There is also no internal USB 3.0 connector.

You can tell Intel uses a more simplified power regulation scheme by the number of inductors around the socket, 8 compared to the P67A-UD4's 14. The VRM heatsinks are also more basic in design, lacking a heatpipe and standing 27 mm tall.

Back panel ports: eSATA, FireWire, 8 x USB 2.0, 2 x USB 3.0, BIOS recovery switch, optical S/PDIF, RJ45, analog audio.

Intel DP67BG: UEFI

The Intel DP67BG has one of the best BIOS/UEFIs we've seen with an unprecedented level of control with regards to fan control and sensors.

UEFI: Performance tab.

UEFI: hardware monitoring screen.

UEFI: fan and temperature settings.

The DP67BG offers a similar level of voltage control to the P67A-UD4, though it has a significantly higher maximum CPU voltage and a substantially lower maximum memory voltage. Furthermore, there are three settings for Vdroop which affects how high Vcore gets on load (high Vdroop can save power while low Vdroop can improve stability).

The most impressive thing is the deceptive-looking hardware monitoring section. It seems initially like a standard read-out of fan speeds, temperatures, and voltages, but each item can be selected, revealing an additional screen. Every single fan header has customized control settings and threshold/warning levels can be set for all the temperature and voltage sensors. Additionally, if a temperature becomes too high, it can be configured to override the automated fan control.

UEFI Summary: Intel DP67BG
Host Clock Frequency
100 to 120 MHz
Processor Voltage Override Type None (default), Static (one voltage at all times), Dynamic (set upper voltage limit)
Processor Voltage Override 1.0000V to 2.3000V in 0.0125V increments
Processor VR Droop Control Low, Mid, High
PCH Core
1.0000V to 1.5000V in 0.0125V increments (1.050V default)
Processor System Agent Voltage
0.850V to 1.750V in 0.025V increments (0.925V default)
Processor I/O Voltage 1.000V to 1.800V in 0.025V increments (1.050V default)
Processor PLL Voltage
1.500V to 2.400V in 0.025V increments (1.850V default)
Memory Multiplier DDR3-1067, 1333, 1600, 1867, 2133
Memory Timing Control Basic
Memory Voltage 1.20V to 2.00V in 0.01V increments
Fan Control (individual settings for all four fan headers) Control Mode (auto or manual), Under-Speed Threshold (RPM), Minimum Duty Cycle, Maximum Duty Cycle
Temperature Settings (individual settings for all temperature sensors) Over-Temperature Threshold,
Control Temperature, All-On Temperature, Responsiveness (high, normal, low), Damping (high, normal, low)

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