I had no problems installing the Silverstone Strider Gold 750 Evolution. I used the longer +12V EPS cable to reach from the bottom of my full tower case to the top of the motherboard. The base system for testing has changed somewhat from last year, so new readings were taken from both Silverstone units for back-to-back efficiency comparison.
AMD Phenom II 1090T X6 BE
ASUS Sabertooth 990FX
Swiftech H20-320 Edge
2x2Gb Crucial Ballistix Tracer DDR3-1600
2x2Gb OCZ Platinum XTE DDR3-2000
60Gb OCZ Agility 2 SSD
Icy Dock 2½" Adapter
1Tb WD Caviar Black
1Tb Hitachi Deskstar
2x320Gb Seagate 7200.10 RAID1
ASUS EAH5870 V2 1G
Zalman VF3000A Cooler
Optiarc 24x DVD+/-RW
Cooler Master HAF932 AMD Edition
Using a Kill-a-Watt meter, I measured the power usage of the system at the outlet, during both idle and load. To generate the load I used OCCT's power supply test utility, which stresses both the CPU and GPU up to 100%. With AMD Cool-n-Quiet enabled, the CPU reduces clocks and voltages at idle, similar to the power saving mode of the GPU. Thus around 150W is being consumed when there's very little running in the system, and up to 542W at peak load. Compared to the max continuous rating that Silverstone gives the Strider Gold 750W Evolution, a little more than 70% is being utilized. You normally want your system to utilize around 50% of the maximum rated power, as this is where the PSU will be the most efficient.
With a Fluke digital multimeter, I also took voltage readings at the back of the connector under idle and load conditions. The +5V and +12V rails were the most stable, differing by only 0.01V between idle and load, with a variance of only +/- .01V under load. The +3.3V rail differed by as much as +/- .04V, however still varied only .01V under load. This represents an impressively tight amount of control.
In order to test the efficiency of the new Evolution series I performed a back-to-back comparison with the previous Strider Gold model. According to Silverstone, minor improvements to the Evolution power supply design and components should result in a modest 1% increase in efficiency across the board. As you can see, we observed a 2-2½% reduction in power usage at the outlet from the newer unit.
Unfortunately these are the only tests we are capable of conducting at this time. We do not have access to expensive power supply testing equipment nor would we expect most of our readers to understand the detailed findings that such equipment outputs. If you are an electrical engineer or a hardcore PSU enthusiast, I would suggest you check out some other more detailed reviews on this unit or any other before making a purchasing decision.
Let's wrap things up with some final thoughts and conclusion.