Case Power Supply Deals & Case Power Supplies for Sale

Designed for industrial or commercial builds where reliability and continuous operation matter more than low noise or compact size, this 400W unit suits system integrators or IT pros replacing aging hardware in workstations and embedded systems. Buy Now at Newegg

A straightforward pick for anyone building or repairing a PC who wants a mid-range ATX power supply without overcommitting on wattage — 160W suits basic office or home builds running integrated graphics and minimal peripherals. Buy Now at Newegg

A solid option if you need a compact ATX power supply for a low-power build, home theater PC, or a system where a full-size 500W+ unit would be overkill. At 250W, it covers basic office and media setups without drawing more power than necessary. Buy Now at Newegg

A 750W unit sits in a solid range for mid-to-high-end gaming builds or workstations, giving you enough headroom for a discrete GPU without overpaying for wattage you won't use. Buy Now at Newegg

Useful for stage lighting setups running 12V or 36V systems, particularly if you're building or expanding a DIY lighting rig and need a dedicated power supply rather than repurposing something not rated for the load. Buy Now at Newegg

A fully modular SFX power supply at this wattage is useful if you're building a compact PC in a small form factor case, since the modular cables let you leave out anything you don't need to keep airflow clean in a tight space. Buy Now at Newegg

Newegg has this as a direct replacement for the HP Pavilion Slimline s5-1225la, so it's mainly useful if your existing PSU has failed and you want to restore the machine without sourcing a generic unit that may not fit the slim chassis. Buy Now at Newegg

A 2,000W power supply is aimed at high-end builds running multiple GPUs, extreme overclocking setups, or workstations where total system draw pushes well past what a standard 650W to 850W unit can handle. If your build calls for that kind of headroom, this covers it. Buy Now at Newegg

A straightforward pick for anyone building or repairing a budget desktop PC who needs a reliable replacement PSU without paying for wattage they won't use. Buy Now at Newegg

A solid pick for electronics hobbyists, engineers, or makers who need a reliable bench power source for projects requiring a stable 36V DC output at higher wattage than most compact supplies offer. Buy Now at Newegg

A compact, single-output power supply delivering 15V at 2A, the Cosel P30E-15 suits engineers, hobbyists, or technicians who need a reliable bench or embedded power source for low-wattage projects or equipment. Buy Now at Newegg

A spare or replacement power supply for Dell R910 and R810 rack servers, useful if you're maintaining older enterprise hardware and need a compatible unit without sourcing through a vendor. Buy Now at Newegg

A spare or replacement PSU worth looking at if you're building or maintaining a Dell-compatible system and want a branded unit rather than a generic alternative. Buy Now at Newegg

A straightforward upgrade or replacement if your Inspiron 3668 needs more wattage headroom for a GPU or additional components, since the stock PSU in that tower is often a limiting factor for upgrades. Buy Now at Newegg

A direct replacement for Dell PowerEdge R-series servers like the R620, R720, and R820, this 750W unit is what you need if you're running one of those rack servers and a PSU has failed or you want a hot-swap spare on hand. Buy Now at Newegg

A straightforward option if your Dell R320 or R420 server needs a replacement PSU, as the 550W output covers standard rack workloads without overbuilding the power budget. Buy Now at Newegg

Newegg has this DC switching power supply as a replacement or spare for Juniper SSG520 and SSG550 series firewalls, so it's a fairly specific buy suited to network admins maintaining aging Juniper hardware who need a compatible unit without going through a VAR or paying enterprise support pricing. Buy Now at Newegg

A 750W PSU is enough headroom for most mid-to-high-end builds, and the HP G9 line is an enterprise-grade unit, which generally means tighter voltage regulation and longer component life than a typical consumer supply at this price range. Buy Now at Newegg

A 1600W PSU is overkill for most builds, but if you're running a high-end GPU and CPU combo, overclocking heavily, or planning a dual-GPU workstation setup, having that headroom means you're not pushing the unit anywhere near its limits. The Titanium efficiency rating also means less wasted energy as heat compared to Gold or Platinum-rated units. Buy Now at Newegg