AnandTech took a look at the new Gaming-series G1 power supplies from Zippy:
The GSM-6600P (G1) comes with a single 12V rail as we have seen on many power supplies in recent months. This is against the regulation of the actual Power Supply Design Guide, but the guidelines are often disregarded by many manufacturers. The reason it's being ignored is that some manufacturers feel having a single 12V rail that support a higher load helps them to create a more stable PSU that can avoid situations that might lead to a blue-screen/crash/restart when one of the rails gets overloaded, i.e. by a graphics card that requires too much power. This is a somewhat dubious claim, and we will make sure to dig a little deeper into this matter.
Read on at AnandTech. The build quality was excellent and the performance was pretty good too but the PSU is quite noisy and has an efficiency of only 81%, which is a bit low by today's standards.