The Netstor Single Server-Grade 1000 W Power Supply Unit from Dynapower USA is an IPC grade, industrial EPS 12V and ATX 12V 1000 W switching power supply unit. It is a replacement PSU for the NA250A-GPU/ NA260A-GPU-S PCIe expansion box. This PSU efficiently delivers 1000 W of reliable and stable power and also achieves up to 78% operating efficiency. It provides 16 ms hold-up time at maximum load and normal input voltage. The PSU features triple circuit protection that protects power supply and system from being damaged. An active power factor correction (PFC) achieves up to 99% PF for high performance and energy savings. The 3.15" (80 mm) dual cooling fan keeps the unit cool. Its Nickel-plated enclosure provides protection against corrosion. The PSU has UL and TUV safety approvals.