Case Power Supply Deals & Case Power Supplies for Sale

Designed for specific Dell PowerEdge server models, this 750W power supply is the kind of replacement part that's hard to find at a reasonable price outside of enterprise channels, making it worth noting if you're maintaining aging rack or tower server hardware. Buy Now at Newegg

A compact 15W, 24V enclosed power supply from Cosel, a Japanese manufacturer known for industrial-grade components — this is the kind of part engineers and hobbyists reach for when they need a reliable, spec-compliant PSU for automation equipment, embedded systems, or custom electronics builds. Buy Now at Newegg

A straightforward pick for anyone replacing a failed or underpowered PSU in a Dell desktop, particularly older small form factor models that require a proprietary connector and wattage spec rather than a standard ATX unit. Buy Now at Newegg

A solid option if you're building or upgrading a system that needs both 36V and 12V outputs from a single unit, which can simplify wiring in certain custom or industrial setups. Buy Now at Newegg

A direct replacement for the HP EliteDesk 800 G4 desktop, so if your current power supply has failed or you need a spare, this is the compatible unit to look for rather than hunting down a generic alternative. Buy Now at Newegg

A practical grab for anyone building a high-powered workstation, server, or mining rig who needs reliable, enterprise-grade wattage without sourcing from a data center surplus. Buy Now at Newegg

A reliable entry-level option for budget PC builds or system upgrades where you need a certified-efficient PSU without overspending on wattage you won't use. Buy Now at Newegg

A straightforward swap-in replacement for older desktops running low-wattage components, where the original PSU has failed and you just need a reliable unit to get the machine running again without overbuilding for the workload. Buy Now at Newegg

Modular design means you only connect the cables your build actually needs, which keeps airflow cleaner and installation tidier, and this 80 Plus Platinum rating puts efficiency at 92% or higher under typical loads. At $140, that's $30 off the $170 list price for a well-spec'd unit from FSP, a brand that's been making OEM power supplies for major manufacturers for decades. Buy Now at Newegg

Modular cabling keeps your build tidy by letting you run only the cables you actually need, and the Platinum efficiency rating means less wasted energy as heat. A solid pick for mid-to-high-end PC builds where noise and efficiency matter. Buy Now at Newegg

The RM750e is a solid choice for a mid-to-high-end PC build where you want a fully modular PSU, meaning you only connect the cables you actually need, which keeps your case cleaner. At $90, that's $35 off the $125 list price for a Gold-rated unit from one of the more trusted names in PC power supplies. Buy Now at Best Buy

The HX1500i is a 1500W fully modular unit with 80 Plus Platinum efficiency and ATX 3.1 support, which means it has a native 16-pin connector for current-gen GPUs without needing an adapter. At $350, that's $40 off the $390 list price. Buy Now at Best Buy

A direct replacement for the Dell OptiPlex 390 and 790 SFF desktop towers, which use a proprietary form factor that standard ATX power supplies won't fit. Buy Now at Newegg

A compact 1U form factor and 200W output make this a practical replacement or upgrade option for NAS builds where space is tight and you need a power supply that fits a rackmount or small enclosure without extra bulk. Buy Now at Newegg

A straight swap-in replacement for the Dell Optiplex 7010 and 9010 USFF towers, which use a proprietary power supply that isn't easy to source at local stores. Worth bookmarking if yours is failing and you want to avoid the cost of a full system replacement. Buy Now at Newegg

The ROG Loki SFX-L is aimed at small form factor PC builders who need serious wattage, as 1,200W in the SFX-L format gives you headroom for high-end components without the bulk of a full ATX unit. Titanium efficiency rating means less power wasted as heat, and at $323, it's $17 off the $340 list price. Buy Now at Newegg

Rack-mounted networking gear like the MX80 router tends to need replacement or spare power supplies over time, and sourcing OEM Juniper hardware at a reasonable price isn't always straightforward. This is a good option if you're maintaining or expanding a Juniper MX80 deployment and want a manufacturer-spec AC power supply rather than a third-party alternative. Buy Now at Newegg

A solid option if you're building or upgrading a mid-range PC and need a reliable 450W unit without spending on wattage you won't use. FSP is a well-regarded OEM supplier that makes power supplies for several major brands, so you're getting known build quality rather than an unknown generic. Buy Now at Newegg

A straightforward upgrade or replacement option for HP Z440 workstation owners who need to swap out a failing unit or want a genuine OEM power supply rather than a third-party alternative. Buy Now at Newegg