Case Power Supply Deals & Case Power Supplies for Sale

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 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 TFX power supply is a smaller form factor unit designed for slim or compact desktop cases that won't fit a standard ATX supply, so this is primarily useful if you're building or upgrading a small form factor PC that requires that specific size. Buy Now at Newegg

A 650W 1U modular PSU is a fairly specific piece of hardware, suited for rack-mounted server builds or compact industrial systems where space is tight and cable management matters. Newegg has this one listed, and modular wiring means you're only running the cables your build actually needs. Buy Now at Newegg

Modular power supplies let you connect only the cables you actually need, which keeps your build cleaner and airflow less restricted. At 750W with an 80 Plus Gold efficiency rating, this unit suits a mid-to-high-end gaming or workstation build without overpaying for more wattage than you'll use. Buy Now at Newegg

A replacement or upgrade option for Fujitsu system builders and repair technicians who need a compatible 460W switching power supply unit, particularly for matching OEM specs on Fujitsu desktop or workstation builds. Buy Now at Newegg

A straightforward option for anyone running an IBM X3250 M3 server that needs a replacement or spare power supply, keeping aging but still-capable hardware operational without sourcing from a vendor repair program. 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 pick for IT admins or network engineers maintaining Juniper switching or routing hardware who need a replacement or spare 600W AC power supply with front-to-back airflow. Buy Now at Newegg

A straightforward pick for IT admins or network engineers running HPE-based infrastructure who need a replacement or spare power supply unit for compatible switches or servers. Buy Now at Newegg

Rack-level power supplies like this don't come up at accessible prices often, so if you're running or building out a Juniper MX960 router, this is the AC power supply unit designed specifically for that chassis. Buy Now at Newegg

A straightforward swap for anyone upgrading or replacing a failed PSU in an Optiplex 3010, 7010, or 9010 Mini Tower, since these Dell systems use a proprietary form factor that standard ATX supplies won't fit. Buy Now at Newegg

A compact 1U form factor makes this a practical pick for small form factor builds, rack-mounted systems, or any setup where a standard ATX power supply won't physically fit. Buy Now at Newegg

A good option if you're replacing a failed unit in a PowerEdge R320, R330, R420, or R420XR and want a direct-fit replacement without sourcing through Dell directly. Buy Now at Newegg

A straightforward swap for anyone replacing a failed or underpowered unit in a Dell SFF desktop, since the H240AS-00 is a proprietary form factor that won't accept standard ATX supplies. Buy Now at Newegg

A switching power supply in this wattage range is a common upgrade or replacement for desktop PC builds, particularly if you're running mid-range components and need a reliable power source without paying for headroom you won't use. Buy Now at Newegg

A compact option for replacing a lost or damaged laptop charger, particularly if you have multiple Dell devices since the 115W output covers a wide range of Dell models. Buy Now at Newegg

A straightforward pick for budget-conscious PC builders who need a reliable PSU without paying for efficiency ratings beyond what most gaming setups actually require — 650W covers the majority of mid-range GPU and CPU combinations comfortably. Buy Now at Newegg