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BFG Tech ES-800 Power Supply Review - Frequency Conversion

Manufacturer: BFG Tech
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Introduction and Features

BFG Technologies entered the PC power supply market a little over a year ago and now they are back with a completely new 800W model.  The BFG Tech ES-800 features frequency conversion technology to help maximize efficiency across a broad range of loads and it can deliver up to 800W of continuous DC power.  The ES-800 power supply includes four PCI-E connectors to support the latest high end graphic cards and is SLI certified for Nvidia’s 8800 GTX.  And, it incorporates multiple +12V outputs that can deliver up to 780W with no load required on the +3.3V or 5V rails.


The BFG Tech ES-800 power supply uses a single 138mm cooling fan and is available in two different models; one for North America and the other for Europe (different power cords).

BFG Tech PSU Key Features:

•    800 watt continuous power output (up to 40°C)

•    Up to 85% efficient during typical loads

•    Variable operating frequency matches output capacity to load

•    ATX12V v2.2 and EPS12V 2.91 support

•    Compact chassis (165mm deep) for easy installation

•    138mm cooling fan maximizes airflow with minimal noise

•    High quality Japanese capacitors for longer life and reliable operation

•    Four +12V outputs (up to 65A/780W combined)

•    No load required on +3.3V and +5V outputs

•    Four PCI-E connectors (NVIDIA SLI certified for 8800 GTX)

•    Sleeved cables with gold plated connector terminals

•    Active PFC with Universal AC line input

•    Life-time warranty and 24/7 Tech support 

Packaging and Parts


The BFG ES-800 power supply arrived securely packed inside a retail box that highlights the power supply's features and specifications.  In addition to the power supply the package includes a power cord, mounting screws, printed User’s Manual, and a package of cable wraps.


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 (at 40ºC), 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 BFG ES-800 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)

•    FLUKE 87-III True RMS digital multimeter (Accuracy ±0.05%)

•    Extech 380803 Power Analyzer (Accuracy ±0.5% of full scale)

•    Hitachi V-650F 60 MHz dual trace oscilloscope (Accuracy ±3%)

•    Powerstat Variable Autotransformer, 1.4 KVA, 0-140 VAC

•    FLUKE  52-II digital thermometer (Accuracy ±0.3ºC/0.5ºF)

•    Extech Model 407738 digital sound level meter (Accuracy ±1.5 dB)

•    Custom Lian Li PC60 enclosure to simulate real-world operating conditions


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