I purchased this for a friend's build he wanted, that then decided to not move forward with, and it is outside the amazon return window. It is UNOPENED. About PSU (from website):

• 80 PLUS GOLD CERTIFIED EFFICIENCY: Guarantee up to 92% efficiency at 50% load reducing carbon footprint and power consumption, 80+ Gold certification offers steady voltage output with DC to DC topology design for the latest GeForce GPU.

• RTX 5000 series Ready by PCIe 5.1 & ATX 3.1 with NATIVE 12VHPWR CABLE: HELIOS P2-1000G is designed to meet ATX 3.1 standards and PCIe Gen 5.1 connector compatibility while offering up to 200% total power excursion to fulfill the power requirements of next-generation RTX 5000 series graphics cards. The native 16 PIN (12VHPWR) PCIe connector can deliver up to 600W for PCIe 5.1 graphics cards, providing powerful and stable performance and allowing the PSU to natively run next-generation GPUs.

• Quiet Operation with 135mm DUAL-BALL BEARING SMART FAN CONTROL: Featuring a high-quality 135mm dual-ball bearing fan, providing excellent thermals, acoustics, and high durability to ensure a longer PSU lifetime. Furthermore, the smart fan will adjust the fan speed and minimizes undesired noise.

• FULLY MODULAR DESIGN & EXTENSIVE GPU SUPPORT: The HELIOS 1000 Wattage Gold PSU is designed to support new NVIDIA and AMD graphics cards with increased power demands and different connectors, with additional support to a 12+4-pin VGA power connector (12VHPWR) and up to four 6+2-pin VGA power connectors. This PSU offers complete protection, meeting full demands to help the system operate safely and stably.