Review Index:

OCZ ProXStream 1,000W Power Supply Review

Manufacturer: OCZ Technology

Introduction and Features

OCZ designed the multi-GPU ready ProXStream 1,000W power supply specifically for demanding PC enthusiasts, high-end system builders, and die-hard gamers!  OCZ's ProXStream power supply incorporates a powerful, server-class core that delivers stable output voltages with high efficiency and minimal electrical noise in a very compact chassis.  The power supply features quad +12V outputs, four dedicated PCI-E connectors, active PFC, and sleeved cables.  Cooling is provided by a single high-speed fan.  <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />



OCZ ProXStream 1,000W PSU Key Features:


  • 1,000 watt maximum continuous power output

  • Quad +12V outputs (up to 70A/840W)

  • Compact enclosure (150 x 86 x 140mm WxHxD)

  • Four channel PCI-e connectors

  • Single, variable speed, internal 80mm cooling fan

  • Server-class, industrial grade components

  • High efficiency (80% to 83% typical load)

  • Black mirror-finish enclosure with sleeved cables

  • Active PFC with Universal AC line input

  • 3-Year warranty 

In addition to the ProXStream power supply the colorfully printed box includes a power cord, mounting screws, and a printed User's Manual. 



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

  • Size and Weight


The OCZ ProXStream 1kW 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 ouputs)

  • (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)

  • <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />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 407736 digital sound level meter (Accuracy ±1.5 dB)

  • AccuLab V1-10kg digital balance (Accuracy ±1g)

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


(CSI Programmable DC Loads)

(Extech AC Power Analyzer)



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