Installation:
There were no issues during my installation of this power supply so you shouldn't need to expect anything different from any other power supply swap when installing the Commander.

Testing:
Testing Disclaimer: To truly test a computer power supply to it's fullest extent would require equipment far beyond the budget of any part time reviewer. For that reason, our power supply tests are simple real world tests done by measuring it's performance when running in an above-average computer system. Since any good power supply should be able to regulate it's voltages, I never expect to see much of a change in that area. Therefore, take our power supply tests as providing some overall feedback on how I felt all aspects of the power supply performed.

Testing System:
CPU: Intel Core2Quad Q6600 2.4ghz @ Stock Speeds
Motherboard: Asus P5K-E WIFI-AP
Memory: 4x1gb Patriot Extreme Performance DDR2 800mhz (4-4-4-12)
HDD: Western Digital 500GB SATAII
DVD+/-RW: Pioneer DVD-R212
Video: Asus 8800GT 1GB
Sound: MOTU 8PRE Firewire Audio Interface
Power Supply: InWin Commander 750W
OS: Microsoft Windows Vista Ultimate Edition x64

On the testing system used I was able to maintain the following voltages during both idle and load states: +3.37V, +12.05V, +5.11V. Of course no voltage fluctuation shows that the power supply is more than capable of keeping regulated voltages no matter how much power is being drawn from it to stress it.

Noise levels of this power supply was probably the part of testing that I was most excited to observe. Since I rarely ever get the opportunity to review power supplies cooled by 140mm fans (since so few exist) I am always intrigued to see if the manufacturer will pull off implimenting these larger fans with either more or less noise than a 120mm one. Being a thermally controlled fan on an 80PLUS power supply, I knew right from the start that this would not be a loud power supply by any means. Upon powering it up I was pleasantly surprised to find that the fan itself was fairly quiet but the airflow generated from this larger fan was what made it slightly louder than the past several 120mm fan cooled power supplies I've reviewed here. However, this is strictly airflow noise and not mechanical noise so it was greatly reduced when the power supply was actually mounted inside my case with all the side panels on it. Airflow noise is also much easier to listen to than mechanical noise; we almost block it out as we would the sound of our heating/cooling ducts.