INTRODUCTION

    Roughly 2 months away from the Christmas holidays and with all the announcements by AMD, Intel and NVIDIA (some already delivered, some by January) it's a safe bet that soon enough many people all over the world will either be building new systems or upgrading their old ones. So, it's no wonder that many manufacturers are ramping up production of new models and with power supply units taking the center stage whenever new graphics cards are involved, we've actually seen quite a few such unveilings lately. One of them is no other than the V4 version of Seasonics award winning FOCUS GX line of power supply units and today with me I have the 850W output model.

    Sea Sonic Electronics Co., Ltd was founded more than 40 years ago by engineers. Since its early beginnings the company has rigorously maintained its focus on the research, development and production of technologically advanced, high quality products. In 1981 Sea Sonic expanded into the production of PC power supplies to become one of the first manufacturers in this market. Soon after, the manufacturing of high quality and performance PC power supplies became the core identity of Sea Sonic.

   As its name clearly states the FOCUS GX V4 is the 4th line to carry that name and even though the previous model was released last year Seasonic decided to further improve it and well, they have. So once again the FOCUS GX line of ATX 3.1 & PCIe 5.1 compliant power supply units includes 3 different output models (750/850/1000W )available in 2 different colors (black and white) all of which are fully modular and sport the 80 PLUS Gold certification (up to 92% electrical efficiency). The new FOCUS GX-850 which I have here with me today is equipped with one of the new 12V-2X6 power connectors (600W), three 6+2 pin PCIe power connectors, single strong +12V rail (70A) capable of delivering roughly 97% of the units’ total power output (840W) and a peak power output of no less than 968W (peak should now be up to around 1.93KW for up to 100ms - once again however this is not something I can test). The biggest update of the new FOCUS GX line is of course the OptiSink technology Seasonic has used which basically delivers better heat dissipation (up to 8 times better) by using automated surface mount technology to install smaller MOSFET and heatsinks onto a newly designed PCB (this results in higher reliability and lower costs). Needless to say the FOCUS GX-850 also sports full-bridge LLC with DC to DC design, active PFC, digital hybrid fan control (3 modes for the internal 135mm fan - fanless, silent and cooling), high-quality Japanese capacitors certified for use up to 105 degrees Celsius and a full array of electrical protections including over-current (OCP), over-voltage (OVP), under-voltage (UVP), short-circuit (SCP), over-temperature (OTP) and over-power (OPP). Finally, Seasonic once again covers their FOCUS GX line with a rather generous 10-year limited warranty.