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Antec TruePower 550watt Power Supply Review - Specifications

Power Supply Units, or PSUs, can often be overlooked as an unimportant product when it comes to choosing the specifications for your PC. For quite a while now Enermax have had control over the high-end PSU market but just recently Antec have entered as a challenger with their TruePower line of PSUs which are being marketed right toward the enthusiast user. After almost four weeks of torture testing, Asher "Acid" Moses has completed his review of the Antec 550watt PSU which includes extensive testing to see if the stated specifications do indeed hold true.

By: | Other PSUs in Cases, Cooling & PSU | Posted: Jul 10, 2002 4:00 am
TweakTown Rating: 9.5%Manufacturer: Antec



ATX 12v, 2.03 compliant.


Can be used with either Pentium 4 or AMD motherboards.


Dual ball bearing, thermostatic fans with speed controllers to regulate temperature inside the power supply.


Individual voltage outputs and regulation for stable +5v, +3.3v, +12v outputs.


Gold plated connectors.


MTBF 80,000 hours.


Input Voltage: 115v / 230v AC manually switched.


Frequency: 60Hz / 50 Hz.


Input current: 12A for 115v, 6A for 230v.


- Output Voltage


+5v at 40 amps


+12v at 24 amps


+3.3v at 32 amps


-5v at 0.5 amp


-12v at 1 amp


+5v SB at 2 amp


- Motherboard Connectors


20-pin Main Power Connector


6-pin Aux Power Connector


4-pin +12v Power Connector (Provide for the extra power needs of Pentium 4 CPUs).


- Peripheral Connectors


8x 4-pin peripheral connectors


2x 4-pin floppy drive connectors


2x 2-pin Case fan connectors for controlling 2 case fans for optimum balance between cooling and low noise.


- Power_On Signal


In the ATX Power Supply, this signal supports the ability to power the system down with software. Windows will automatically shut down the computer, rather than display a message that it is safe to shut down the computer. This also allows the optional use of the keyboard to power the system back on.


- +5v_SB (standby) Signal


This voltage is always active, giving the motherboard a limited source of power, even when the computer is switched off (case switch).


- +5v Power_Good (OK) Signal


This is generated in the power supply (+3v to +6v) when it has passed its self-tests and the outputs have stabilised - This takes 100 to 500 milliseconds after the supply is turned on. If the Power_Good signal drops below +3v, it causes the motherboard to issue a systems reset signal and shuts off the CPU clock. The effect of this repeated reset signal stops the computer from operating.


- -5v and -12v Voltage Output


The -5v and -12v voltages are not used at all in many modern systems, although they are still required for backward compatibility.


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Further Reading: Read and find more Cases, Cooling & PSU content at our Cases, Cooling & PSU reviews, guides and articles index page.

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