Case Power Supply Deals & Case Power Supplies for Sale

A solid pick if your PC build has a high-power GPU or multiple drives and you want a reliable unit without paying a premium for modular cables you may not need anyway. Buy Now at Newegg

A straightforward pick for anyone building or repairing a budget desktop PC who needs a reliable power supply without spending much on a component that mostly just needs to work. Buy Now at Newegg

A solid option if your desktop PC build calls for a reliable, no-frills 400W ATX power supply without paying for headroom you won't use — FSP is a well-regarded OEM manufacturer that supplies components to many name-brand system builders. Buy Now at Newegg

A high-wattage server PSU like this suits homelab builders, mining rigs, or anyone running power-hungry workloads that standard consumer units can't reliably handle. Buy Now at Newegg

A straightforward pick for IT professionals or lab operators maintaining older HP ProLiant DL380 G4 servers that need a replacement or spare power supply unit. Buy Now at Newegg

A direct replacement for anyone running a Dell OptiPlex 780, 790, 990, 7010, or 9010 desktop who needs a new power supply without hunting for compatibility information. Buy Now at Newegg

A straightforward upgrade or replacement option for anyone running a Dell OptiPlex 7460 All-in-One whose original power supply has failed or is showing signs of wear. Buy Now at Newegg

A compact 1U Flex ATX power supply rated at 250W with 80 Plus Bronze efficiency, which suits small form factor builds, HTPCs, or industrial systems where space is tight and a standard ATX unit simply won't fit. Buy Now at Newegg

Older desktop builds that use AT-style power supplies (rather than the modern ATX standard) are rare to find parts for, so this is a practical option if you're restoring or maintaining a vintage PC from the late 1980s or 1990s. Buy Now at Newegg

A direct replacement for aging Dell Optiplex GX620 and PowerEdge SC440 units that need a new power supply, this is a fairly specific part that's worth bookmarking if you're maintaining older Dell hardware. Buy Now at Newegg

A practical pick if you're maintaining or upgrading Oracle Sun X3-2 or X4170 M3 servers and need a compatible replacement PSU without sourcing directly from Oracle. Buy Now at Newegg

Redundant power supplies are mainly relevant for servers or workstations where downtime from a single PSU failure isn't acceptable, so this is aimed at IT environments or home lab setups running critical workloads. The 3U form factor means you'll want to confirm it fits your rack chassis before ordering. Buy Now at Newegg

Solid pick for a mid-to-high-end PC build where you want a reliable, fully modular unit with enough headroom for a discrete GPU without overpaying for wattage you'll never use. Buy Now at Newegg

A purpose-built option for anyone setting up a cryptocurrency mining rig or running multiple GPUs, where standard consumer PSUs often fall short on sustained load capacity. Buy Now at Newegg

A direct replacement option for anyone repairing or upgrading a small form factor PC that uses a proprietary Dell or HP power supply, where standard ATX units won't fit. Buy Now at Newegg

A 1U form factor makes this a practical fit for rack-mounted servers or custom builds where vertical space is limited, and 400W covers most single-CPU server configurations without overprovisioning. Buy Now at Newegg

A solid option if you're building or upgrading a mid-range PC and need a reliable PSU without overspending — 650W covers most single-GPU builds comfortably, and FSP is a well-regarded manufacturer in the power supply space. Buy Now at Newegg

A 2U form factor makes this a practical fit for rack-mounted servers and compact builds where a standard ATX PSU won't physically fit, and 600W gives you enough headroom for most mid-range server configurations. Buy Now at Newegg

Modular cabling means you only connect what your build actually needs, keeping airflow cleaner and cable management simpler — a worthwhile feature if you're putting together a mid-to-high-end PC and want to avoid a rat's nest behind the motherboard tray. The ATX 3.1 spec also adds native 16-pin connector support for current Nvidia GPUs, so you won't need an adapter. Buy Now at Newegg