Enermax Modu 82+ 625 Watt PSU Evaluation

Performance

For performance testing we like to test real power draw from the wall as well as the individual lines ability to handle the power needs of a high-end system. To measure draw from the outlet we use a Kill A Watt Model P4400. For internal power readings we use three Fluke 87V Digital Multimeters. These are connected to the 12v, 5v and 3.3v lines. Since the Modu 82+ has three separate 12v rails I needed to move the third 87V for each test run to make sure I was reading the proper draw.

These numbers are then combined into the table you see below. We run four distinct types of load on the system and PSU to determine if it will handle your power needs and maintain stability.

Load-1 - This is really nothing more than a full 32MB run of Hyper Pi 0.99b. HyperPi uses the CPU, memory and hard drives causing a good amount of power usage. I will test for 3.3, 5, and 12 volt stability as well as seeing what the wattage use from the wall is. I will take a wattage measurement at each loop and then average this for the final wattage score. I will also take the Voltage reading at each loop and this will result in my average. Final numbers will be high, low and average for each reading.
Load-2 - For this test I will run a full render in LightWave 09 [x64] I will use Moonbase as the sample for rendering. I will take readings for Wattage, and voltage every 10 minutes and average these out. The same High, low and average will be recorded. Final numbers will be high, low and average for each reading.
Load-3 - Load test 3 will consist of a full defragmentation using O&O Defrag Professional Edition [Space] of the system drive. Again voltage readings will be done every 10 minutes.
Load-4 - Finally, the gaming tests. For this test I will run Cryostasis and then Call of Duty World at War for 1 hour each. Readings will be taken every 10 minutes and every level load. Final numbers will be high, low and average for each reading.

The Victim

• Intel Core i7 Extreme 975
• GIGABYTE X58 Extreme Mainboard
• 2x Zotec AMP! Edition GTX 280s [SLI]
• 3 GB Kingston KHX1600D3K3/3GX
• LSI MegaRAID SAS 8344ELP
• 2x Seagate 147GB 15k RPM SAS HDDs [RAID 0]
• Generic DVD-RW, SATA
• Swiftech H20 220 Apex Ultima [With Apogee GTZ]
• Microsoft Windows 7 RC1 x64 [Build 7100]

The Modu 82+ did an excellent job of keeping up with our test system. The voltages being sent to the system remained stable and we saw no fluctuations at all despite the loads we placed on it.