Open-BOX Fresh pulles from Brand New Towers.. We replaced the factory psu with 1600W psus.The PS-4122-1 HP Omen 45L 1200W ATX 3.0 Power Supply is a high-quality power supply unit designed for computer systems requiring reliable and efficient power delivery. With a maximum output power of 1200W and 80 Plus Gold certification, this PSU ensures stable and clean power output for optimal system performance. The ATX form factor and compatibility with various connectors make it easy to install and use in a wide range of systems. Additionally, the 1 fan cooling system ensures adequate ventilation to prevent overheating, making it a reliable choice for computer enthusiasts and professionals alike.

Close-up of the same label plus the Cooler Master side plate. Label also lists +12V 99A, +5.1V 18A, +3.3V 12A.

What this unit actually is

• OEM PSU for the HP Omen 45L desktop (ATX 3.0 / 12VHPWR-era 1200W Gold).
• Cross-listed part numbers: PS-4122-1, N28487-001, N28487-003, DPS-1200AB-26A.
• Fixed cables, not a fully modular aftermarket unit. Typical loom: 24-pin ATX, 4+4 EPS, 12-pin PCIe (Omen GPU harness), 3× SATA.
• Silver steel case, black honeycomb intake, IEC C14 inlet.

Strong photo set for this PSU:

1. 3/4 front with cables fanned out (like the first shot).
2. Rear IEC + grill.
3. Side with Cooler Master mark.
4. Tight, readable sticker (part number + 1200W + 80 Plus Gold).
5. Each connector type: 24-pin, 4+4, SATA.
6. Any scuffs, bent pins, or missing strain relief.
7. Scale shot (next to a ruler or ATX case bay).What is actually on this Omen PSU

   Factory harness for PS-4122-1 is listed as:

   • 24-pin ATX
   • 4+4 CPU
   • one 12-pin PCIe GPU cable
   • 3× SATA

   No extra 8-pin GPU leads on the stock loom. That single 12-pin lead is the high-density GPU cable HP used so the 45L could feed a factory 40-series / 12VHPWR-class card from one plug. Some templates call it “16 Pin PCIe” because sellers lump 12-pin and 12+4 / 12VHPWR together.

   Early 45L configs (RTX 3070 Ti era) used NVIDIA’s older 12-pin only socket and bundled a 12-pin → 2× 8-pin adapter. Later 1200 W ATX 3.0 machines were sold as 12VHPWR. Same PSU family, so the plug on a given unit can be either:

   1. 12-pin only (no 4 sense pins) — fits 30-series FE and some OEM HP cards
   2. 16-pin 12VHPWR (12+4) — native for 4080/4090-class cards

   You cannot tell from the model number alone. Count the pins on the plug in your hand.