The Test:
The test that was done for this power supply was fairly simple. We had to test for the voltage stability of this unit. To generate conditions for testing voltage stability, we had to get the system at full load to get a higher load on the power supply. This was done by running both Prime95 and SETI@home. We monitored the system's 12V and 5V fluctuations via Motherboard Monitor. The refresh rate for Motherboard Monitor was set to every 2 seconds. This process continued for 6 hours. As a reference, we managed to borrow an Enermax Whisper 350W power supply. Here's the specs on the PC used in this test.

• Athlon TBird 1.4GHz @ 1.6GHz (12x133MHz)
• Epox 8K7A (AMD761 Chipset)
• 512MB PC2400 Mushkin Memory (2x256MB)
• GeForce2 GTS
• Creative Soundblaster Live! Value
• Promise Fasttrak100
• 3Com 3C905B 10/100Mbps NIC
• Iomega 12X CDRW Drive
• Toshiba 16X DVDROM Drive
• IBM 15GB ATA100 7200RPM HDD
• IBM 60GB ATA100 7200RPM HDD
• (2) Maxtor 30GB ATA100 7200RPM HDD in RAID0

As you can see here, as system with this many peripherals would put a strain on any power supply. As if that wasn't enough, the Epox 8K7A uses 2-phase voltage regulation. This makes the system even more prone to voltage fluctuations (therefore affecting stability) than systems that make use of boards with 3-phase voltage regulations (such as the Soyo DRAGON Plus!).

The Antec showed more stability over the Enermax over the course of the 6 hour test. The Antec had high/low fluctuation of +0.09V/-0.14V whereas the Enermax had a +0.12V/-0.17V. The average of the detected voltage of the Antec was also closer to the actual 12.00V with 12.01V whereas the Enermax ran at 11.97V.

Here we've got pretty much the same results. As a general rule of thumb, should the voltage here drop below 4.8V the PC is likely to experience stability problems. While in this test, there were no crashes, the Enermax did in fact drop below 4.8V. The Antec has a high/low fluctuation of +0.03V/-0.18V and the Enermax had +0.07V/-0.22V. For the duration of the test, the Antec also had a average that was closer to 5V running at 4.89V whereas the Enermax was at 4.81V.