Power Supply Selection
Pentium® 4 processor-based PCs should use either ATX12V or SFX12V power supply. Failure to use the correct power supply, may result in damage to the motherboard and/or power supply.
ATX12V power supplies are designed to be downward compatible with standard ATX power supplies. Therefore, an ATX12V power supply will perform in place of an ATX of equal power.
The new +12VDC connector lies near the processor's DC converter and voltage regulators, enabling the delivery of more current, higher power conversion and transmission efficiencies,
and future platform flexibility on Pentium 4 processor-based boards. Additionally, there is a 6-pin Aux connector associated with the ATX12V power supply. This auxiliary power connector provides additional +3.3VDC and +5VDC current.
Power Supply Tips
Trends in PC system power management solutions (for example, "Instantly Available PC", "Suspend-to-RAM") are driving a need for increased +5 VSB current capability for all ATX-family power supplies. The previous +5 VSB output requirement is being raised to 1.0 amps minimum, with 2.0 amps preferred.
Using any connector adapter to create a 2x2 connector with an ATX or SFX power supply is not recommended. The use of these 4 pin peripheral to 2x2 adapters can result in power supply, motherboard and general system damage.
ATX12V and SFX12V power supplies are designed to have light loads on 5V. ATX power supplies regulate voltage using the 5V power rail and often will have noise or voltage issues with light loads on 5V. It is therefore not recommended to be used in Pentium 4 processor-based PCs.