Case Power Supply Deals & Case Power Supplies for Sale

This dock is worth a look if your gaming rig has an Alienware-compatible graphics card that's outgrown your current power supply's capacity. It's built specifically for Dell's ecosystem, so double-check compatibility with your setup before buying from Newegg. Buy Now at Newegg

Anyone building a high-end rig with power-hungry GPUs or planning multiple graphics cards will appreciate the 1,800W headroom, and the modular cables mean you're only running what you actually need. Newegg has this listed with the efficiency certifications that matter if you want lower electricity costs over the long run. Buy Now at Newegg

This power supply suits anyone running a rig of multiple GPUs for mining or heavy compute tasks, where you need consistent high-wattage output that a standard desktop PSU can't reliably handle. Buy Now at Newegg

This power supply suits anyone building or repairing a budget PC where a reliable, no-frills 200W unit gets the job done without paying for capacity you don't need. Newegg carries the FSP200-50SHNCA for those wanting a straightforward replacement part from an established manufacturer. Buy Now at Newegg

Anyone running a home server or NAS setup benefits from swapping in a dedicated switching power supply like this, since it's built to handle sustained loads more reliably than a standard consumer PSU. Buy Now at Newegg

Server admins swapping out a failed power supply or building redundancy into a rack setup will want this on hand, since matching Supermicro's exact PSU spec avoids compatibility headaches with existing chassis. Buy Now at Newegg

Aimed at high-end PC builders running power-hungry GPUs or multi-GPU setups, the HX1200i delivers 1,200W of output with 80 Plus Platinum efficiency and a fully modular cable design that keeps your build clean. At $300, that's $45 off the $345 list price. Buy Now at Best Buy

Anyone running an HP M4600, M4650, M4200f, or M4900c who needs a direct replacement power supply will want this over a generic universal unit, since it's built to match those models' exact specs and connectors. Buy Now at Newegg

Data centers and small form factor server builds needing a compact, efficient power supply will get solid mileage out of this one, thanks to its Flex 1U footprint and 80 Plus Gold efficiency rating. Buy Now at Newegg

Data centers and NAS enthusiasts running redundant storage arrays need power supplies built for that specific hardware footprint, and this 530W unit from Newegg fits disk array enclosures where a standard ATX supply won't. Buy Now at Newegg

Server rooms and home lab setups running power-hungry Gen9 configurations are exactly what this PSU was built for, delivering the wattage headroom needed to keep multiple drives and processors running without strain. Newegg's stock makes it a straightforward option if you're replacing a failed unit or upgrading capacity on existing HP Gen9 hardware. Buy Now at Newegg

Data center admins and small businesses running Lenovo RD540/RD640 rack servers will want a reliable replacement or backup power supply on hand, since matching the OEM spec keeps your redundancy setup intact. Newegg carries this one for those exact server models, so you won't have to guess about compatibility. Buy Now at Newegg

This power supply is a straightforward fix for anyone whose ThinkCentre E93z all-in-one has a failing or dead PSU, letting you get the exact factory-spec replacement instead of hunting for a generic 150W unit that may not fit the system's connectors. Buy Now at Newegg

Worth grabbing as a replacement or backup PSU for a compact HP desktop build, since it's built to the exact spec HP systems expect rather than a generic universal unit. Buy Now at Newegg

Handles a mid-range build without issue, so it suits anyone assembling a gaming PC or workstation that doesn't need high-wattage headroom for multiple GPUs. Buy Now at Newegg

Anyone building a high-end rig with multiple GPUs or overclocked components will want that much headroom, and the modular cables mean you're not stuffing unused wires into your case. Newegg's build quality standards on ATX supplies make it a safer bet for a part that's expensive to replace if it fails. Buy Now at Newegg

Small form factor Dell OptiPlex builds need a power supply that matches the case dimensions exactly, and this 180W replacement fits without the workarounds a generic unit might require. Handy to keep on hand if your current PSU is aging or already showing signs of failure. Buy Now at Newegg

Small form factor desktop owners running an Optiplex 760 or 980 will want this on hand as a direct replacement when the original power supply starts failing, since finding a compatible unit for these older Dell builds isn't always straightforward. It's a practical, no-frills fix rather than an upgrade. Buy Now at Newegg

Small builds with tight cases benefit most here, since the Micro ATX form factor is made to fit compact PC setups where a standard PSU won't squeeze in. It carries an 80 Plus certification, so you get a baseline of energy efficiency without paying for higher-tier ratings you may not need. Buy Now at Newegg