Antec Signature 850W Review

paulktreg - September 18, 2008
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Input	100VAC-240VAC \| 13A-6.5A \| 47Hz – 63Hz
Voltage	3V3	5V0	12V1	12V2	12V3	12V4	-12V	5VSB
Maximum Load	25A	25A	22A	22A	25A	25A	0.5A	3A
Minimum Load	0A	0A	0A	0A	0A	0A	0A	0A
Regulation	±3%	±3%	±3%	±3%	±3%	±3%	±6%	±3%
Ripple & Noise	50	50	120	120	120	120	120	50
Combined Max	160W		780W				N/A	N/A
Total Power	850W Continuous @ 50°C

Note: The maximum output power given in the manual is 850W. The specification label on the side of the power supply also states a 829W maximum for combined 3V3, 5V and the four 12V rails. I have a fixed 15.5W load on the 5VSB and -12V rails which effectively gives me a maximum of 844.5W for the Antec Signature. This is the figure I will base my tests on.

System Protection

There are no specific figures given for the protection circuitry. The following information is given in the user manual:

"A variety of industrial-grade safety circuitry will help protect your computer: OVP (Over Voltage Protection), SCP (Short Circuit Protection) and OCP (Over Current Protection). Sometimes the PSU will latch into a protected state. This means that you will need to clear the fault and turn the power off to the PSU before it will function again. There are no user replaceable fuses in your Signature series PSU."

If you refer to the test certificate on the first page we are given written "proof" that all these safety features have been tested and passed by T. Xiong before the PSU is released.

Power Supply Weight
Manufacturer/Model	Weight
Antec Signature 850W	2.78kg	6.14lbs

Antec Signature 850W Connectors
20+4 Pin Motherboard	Hard Wired	1
PCI-E 6+2 Pin	Hard Wired	2
EPS12V 8 Pin	Hard Wired	1
P4-12V 4 Pin	Hard Wired	1
Molex 4 Pin	Hard Wired	3
SATA Power	Hard Wired	3
FDD 4 Pin Power	Hard Wired	1
PCI-E 6 Pin	Modular	2
Molex 4 Pin	Modular	6
SATA Power	Modular	6

Features:

Unlike the other power supplies I have tested I cannot find a definitive list of features in the accompanying literature. The list of features below is taken from the Antec website.