Final Thoughts & Conclusion
We've had hands on SilverStone high end power supplies before and knew what to expect. Without fail they always beat the rated specifications and exceed our expectations. SilverStone's rated variance on the ST1500-GS is 3% while the industry standard is 5% and Silverstone guarantees that 3% + or - so you know the quality manufacturing and engineering is a given. Over the years we've had plenty of SilverStone products in hand and we've yet to see one that disappoints.
The 135mm whisper quiet fan didn't hurt our feelings any and we like having a watt monster PSU that fits into a 150mm (W) x 86mm (H) x 180mm (D) footprint that will fit most modern cases allowing you to stash massive power into a small chassis. Now the price tag might put some people back as it runs $399 but if you need a highly efficient PSU capable of handling anything you throw at it then you know these high wattage high efficiency PSU cost a few clams.
WIth increasing power costs a bronze power supply will take 80% of the power from the wall and deliver it to your PC, the SilverStone ST1500-GS 80+ Gold will deliver 7-9% more than an 80+ bronze and does it with that small footprint and 646.55W per liter power density and 87-90% efficiency. Our heat exhaust reading after an hour load ran 43oC or 109oF so it's not going to heat up your computing space or contribute to your cases internal heat load.
We like the 100% modularity of the SilverStone ST1500-GS and 100% modular is the exception, not the rule. Most "Modular" PSU have a 24 pin ATX (motherboard) connector and at least one 4x4 CPU power connector hard wired. Many have a SATA cable hard wired as well so they are partially modular and trust us a fully modular PSU is a luxury in itself.
We like the SilverStone SST-ST1500-GS for its watt monster nature, small footprint, efficiency as well as it's quiet and cool operation. It's a rare feeling when you know you have quality power feeding your valuable components and anything you throw at it is covered. Virtual Coin miners could set up an 8 GPU mining rack off one PSU and still have a few watts left over and if a PSU can do that then everything a home user can throw at it is covered and leaves enough headroom so there's no worry about over stressing.