Case Power Supply Deals & Case Power Supplies for Sale

A compact 1U Flex ATX form factor makes this a practical pick for small form factor builds, HTPCs, or low-power NAS and mini-ITX systems where a standard ATX unit simply won't fit. Buy Now at Newegg

A replacement power supply purpose-built for the HSU400D48+12 stage gobo wave light, so if yours has failed or you need a spare on hand for live events, this is a direct fit rather than a generic workaround. 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 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 straightforward drop-in replacement if your Vostro or Inspiron desktop has a failing or underpowered TFX-format PSU, and the 250W output covers the stock requirements for most slim-form-factor Dell builds in that lineup. Buy Now at Newegg

Designed as a direct replacement for the power supply units found in HP Pro and Elite small form factor desktops, this is a straightforward option if your original PSU has failed and you want a compatible swap without hunting for specs. 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 straightforward pick for anyone running or upgrading a mid-to-high-end desktop build, the 750W output gives you enough headroom for a discrete GPU and modern CPU without oversizing the unit. 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 switching power supply replacement like this is primarily useful if you're repairing or upgrading a specific system that requires this exact unit, so confirm your compatibility before buying. Buy Now at Newegg

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 straightforward pick for anyone building or repairing a 1U rackmount server who needs a reliable PSU that fits the compact form factor without stepping up to a full-size unit. Buy Now at Newegg

A compact form factor PSU that fits into small form factor (SFX) cases where a standard ATX unit won't physically fit, so it's mainly relevant if you're building or upgrading a mini-ITX or other compact PC build. 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 purpose-built option for chia farmers running multiple hard drives, where stable, high-wattage power delivery matters more than the flashy specs you'd find on a gaming-focused PSU. Buy Now at Newegg

Rated at 1000W with 80 PLUS Gold efficiency and a fully modular cable setup, this PSU suits high-end builds where you want clean power delivery and the flexibility to run only the cables your system actually needs, priced at $190 with no discount off list. Buy Now at Best Buy

A 1,200W power supply at this price point suits builders running high-end GPU setups, dual-GPU configurations, or systems with heavy overclocking headroom, and the fully modular design keeps unused cables out of the case. At $235, this is at list price with no current discount. Buy Now at Best Buy

Aimed at high-end PC builders running power-hungry GPUs or multi-drive setups, the RM1000e delivers 1,000W of 80 Plus Gold-certified output with a fully modular cable system so you only connect what you need. At $152, that's $48 off the $200 list price. Buy Now at Best Buy