Case Power Supply Deals & Case Power Supplies for Sale

Rack-mounted industrial systems running Emacs or Advantech hardware sometimes need a direct replacement power supply rather than a workaround, and this 150W 1U unit is built specifically for that compatibility. Newegg has it listed if you're sourcing parts for those platforms. Buy Now at Newegg

Suited for mid-to-high-end PC builds that need reliable headroom for power-hungry GPUs and CPUs, with RGB lighting if aesthetics inside your case matter to you. Buy Now at Newegg

A solid option if you're looking to replace or upgrade the power supply in a workstation or server build, particularly since Delta is a well-regarded OEM supplier for major system manufacturers. At 460W, it covers most mid-range builds without overprovisioning. Buy Now at Newegg

Handy for replacing a lost or failed power adapter on older desktop components, external drives, or other 12V peripherals that use a 4-pin connector rather than buying a whole new unit. Buy Now at Newegg

Handy for anyone who builds or troubleshoot PCs and wants a quick way to confirm a power supply is functioning without having to install it in a system first. Buy Now at Newegg

Useful if you're running or repairing an HP XW8600 workstation and need a replacement PSU, since these older server-grade power supplies can be hard to track down at a reasonable price. Buy Now at Newegg

Designed for HP ProLiant DL580 G6 and G7 servers, this is the kind of part you need when a PSU fails and you want a direct replacement without the guesswork of compatibility. A 1,200W server-grade unit at retail typically runs well above most consumer power supplies, so it's worth checking if Newegg's price lines up with what refurb or gray-market server parts go for elsewhere. Buy Now at Newegg

A replacement power supply for the Zebra S4M thermal label printer, which is a common failure point on older units and often cheaper to replace than the printer itself. Buy Now at Newegg

A solid option if you're building or maintaining a server rack and need a high-wattage redundant power supply unit — the 1600W output suits workloads that demand consistent, heavy power draw across multiple components. Buy Now at Newegg

A compact, high-wattage PSU designed for small server builds or workstation upgrades where you need reliable, consistent power delivery in a tight form factor. Buy Now at Newegg

A straightforward replacement option for anyone with a mid-range Dell OptiPlex desktop that needs a new power supply, since the 275W unit fits multiple MT (minitower) generations including the 3010, 7010, and 9010. Buy Now at Newegg

Useful if you're running 12V DC equipment or LED strips that need more current than a standard adapter can provide, or if you're building a bench power setup for electronics work. Buy Now at Newegg

A compact 1U form factor makes this a practical fit for small form factor or ITX builds where a standard ATX PSU physically won't fit, and 250W covers most low-power or media center configurations without excess bulk. Buy Now at Newegg

At $55, that's $45 off the $100 list price for an 850W unit with 80+ Bronze efficiency certification and ATX 3.1 compatibility, which means it supports the 16-pin connector used by current Nvidia GPUs without needing an adapter. Buy Now at Newegg

A direct replacement for Dell PowerEdge R320 and R420 servers, so it's relevant if you're maintaining or repairing one of those rack units and need a compatible 550W power supply rather than sourcing a used or third-party option. Buy Now at Newegg

Replacement power supplies for Epson WorkForce printers aren't something most retailers stock, so this is a useful find if yours has failed and you'd rather replace the supply than the whole printer. Buy Now at Newegg

A straightforward upgrade for Alienware desktop owners whose system is struggling under the load of high-end GPU or CPU additions, since swapping to a higher-wattage PSU from the same manufacturer keeps things compatible without guesswork. Buy Now at Newegg

A replacement power supply board for those dealing with a failed or failing PSU in a compatible unit, rather than replacing the whole device. Buy Now at Newegg

Industrial-grade power supplies from FSP are built for continuous-duty applications and tighter voltage tolerances than typical consumer units, making this a practical option if you're running a home server, NAS, or workstation that stays on around the clock. Buy Now at Newegg