FSP ZEN400 400Watt Passive Cooled Power Supply Review

Cases & PSU/Power Supplies by jmke @ 2007-06-01

FSP launches their latest passive cooled power supply, rated at 400W and equipped with the latest connectors for high(er) end hardware can it provide stability under heavy load? We test this unit to the extreme with two overclocked NVIDIA G80 cards and overclocked Core 2 Duo. Find out how the ZEN400 did.

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Load Tests - Voltage Rails

Load Testing Setup

Geoffrey' Intel Test Setup
CPUIntel E6600
CoolingZalman 9700 LED
MainbordAbit Fatal1ty FP-IN9 SLI
Memory2x 1Gb TEAMGROUP Xtreem 800MHz 4-4-4-10
Video2x NVIDIA Geforce 8800 GTS 320Mb
Other
  • Maxtor 80Gb PATA HDD
  • Seagate 200GB SATA HDD


  • Our first test setup was build to stress the power supply near its maximum, the system was first run at default clock speeds, which resulted in a power draw from the wall socket of 280Watt. We’re running a Core 2 Duo E6600 and two Geforce 8800 GTS in SLI here, with a 1000W PSU unit we could run almost 4 setups like this.

    The system was loaded with Realtime HDR and K7Burn to stress both CPU and VGA cards, the voltage rails where monitored with a multi meter, as well as through Abit’s software tool:

    Madshrimps (c)


    Not only do rails remain well within specs, they hardly fluctuate when the system was stressed. Impressive results.

    Next up we overclocked the CPU to 3.2Ghz with more vcore and also got both Geforce 8800 GTS cards running 600 (GPU) 1000 (MEM) in SLI; total power draw was now 400W:

    Madshrimps (c)


    Yes this is a different chart, the values didn’t really change much, the ZEN400 let the system running stable for hours on end while we pushed the CPU and video cards well beyond specifications. Had you expected to see a high end SLI system run by only a 400Watt PSU? Neither did we, but it’s an testament of a solid product.
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