Installation:
Installation went without a hitch, just as I would have expected for any standard power supply. I was a bit puzzled when I didn't pull a power cable or installation screws out of the box, but I was assured by GlacialPower that all retail units will have these parts and that only my review sample did not include them. Spending some time on cable management and the downfalls of this power supply not being modular were no longer evident. I used the cables I needed and grouped and cabled tied the extra ones together and put them out of sight at the side of an empty drive bay.

Testing:
I will be using the same testing method on the 650A as I do for all power supplies. First, the voltages will be measured with the system at idle and next they will be measured after having the system at 100% load for a period of 30 minutes.

Testing System:
CPU: Intel Core2Quad Q6600 2.4ghz @ Stock Speeds
Motherboard: Asus P5K-E WIFI-AP
Memory: 2x1gb Patriot Extreme Performance DDR2 800mhz (4-4-4-12)
HDD: Western Digital 500GB SATAII
Video: Asus EN7600GS Silent
Sound: Mackie Onyx Satellite Firewire Audio Interface
Power Supply: GlacialPower 650A
OS: Microsoft Windows XP Professional SP3

Starting from the beginning; when I first turned the computer on after installation of the 650A I was surprised to see a mere flutter of the fan before it turned itself off. Although I have not measured the exact power consumption of my system, I take it that my goal to build a powerful and power-friendly system did succeed. Throughout general use of my computer for a day the fan only turned on occasionally for a few minutes which I'm guessing was to cool down the heat, not because of heavy loading requiring it to be constantly on for a while. When the fan powered up, if I had my case's side panel off I could hear a very gentle sounding vibration from it. I tightened all the screws and it still continued, I'm guessing this is possibly bearing related but I couldn't say for sure. With the case panel on, I could not hear this issue so it's really nothing that was an issue for me. This test goes to show that your system is likely drawing much less power than you think, so you don't need to go over-kill on your power supply if you just have a humble system!

Next was the voltage test, as is reported on in the chart above the previous paragraph. Undle system idle, the power supply was putting out voltages right around where I would have expected, although I wouldn't have minded seeing that 3.3V line just a little lower. Since my system wasn't enough to stress the power supply undle idle conditions, the same went for load conditions. I saw practically no voltage fluxuation on any of the lines, unless you count that .01V change on the 5V line which could likely be a region of error. Even under full load, the fan still found ample time to just shut itself off when things wern't hot enough to bother cooling. Although I did see it come on more often and for longer during this load time, it still never did constantly run for any significant length of time.