Enermax Galaxy EVO 1,250W Power Supply Review

Introduction and Features

The EVO 1,250W PSU delivers a lot of power with good regulation, good efficiency, and plenty of cables/connectors. This monster is about as big as you will be able to operate from a standard 120 VAC, 15A residential circuit in NA.

Introduction
           
       
The king of the hill in Enermax’s new PSU lineup is their Galaxy EVO 1,250W unit that picks up where the Revolution85+ series left off (Revolution 85+ 850W, 950W and 1050W).  That extra 200W results in an additional 17A spread out across six +12V outputs.  Otherwise the Galaxy EVO 1,250W PSU is virtually identical to the Revolution85+ 1,050W PSU and offers numerous features targeted towards high-end gaming system and workstation owners.  The Enermax Galaxy EVO 1,250W PSU comes with an excellent selection of both fixed and modular cables with a wealth of connectors to support all the latest hardware.


Enermax Galaxy EVO 1,250W PSU Key Features:

•    1,250W DC output, 24/7 at 50°C
•    1,248W (104A) available on +12V outputs
•    High Efficiency: up to 89% between 20-100% load, 80 Plus Bronze
•    Future CPU and GPU Ready (12-pin sockets and zero load, C6 state)
•    HeatGuard: keeps the fan running for 30-60 sec. after shutdown
•    PowerGuard: LED status monitor (Off-Stby-OK-Fail)
•    SafeGuard (OCP, OVP, AC/DC UVP, OPP, OTP, SCP, SIP)
•    CrossFireX Certified (up to HD4870X2)
•    3-Year Warranty




PSU Testing Methodology

Establishing an accurate load is critical to testing and evaluating a PC power supply.  PCPerspective’s power supply test bench can place a precise 2,000 watt DC load on the PSU under test.  Each power supply is tested under controlled, real-world conditions up to its maximum rated load, using both 115 VAC and 240 VAC line voltage.  Our current suite of tests includes:

•    DC Load Regulation
•    DC Line Regulation
•    DC Cross-load (unbalanced load)
•    AC Ripple and Noise
•    Power Factor
•    Efficiency
•    Differential Temperature
•    Noise


The Enermax Galaxy EVO 1,250W power supply was evaluated on both features and performance.  A full range of equipment was used to test the power supply under controlled load conditions. 

•    (2) CSI3710A Programmable DC load (+3.3V and +5V outputs)
•    (4) CSI3711A Programmable DC load (+12V1, +12V2, +12V3, and +12V4)
•    Extech MultiMaster MM570 digital multimeter (Accuracy ±0.02%)
•    Extech 380803 Power Analyzer (Accuracy ±0.5% of full scale)
•    DS1M12 “StingRay” digital oscilloscope (20M S/s with 12 Bit ADC)
•    Powerstat Variable Autotransformer, 1.4 KVA, 0-140 VAC
•    Extech Model 407738 digital sound level meter (Accuracy ±1.5 dB)
•    Custom PC60 enclosure to simulate real-world operating conditions