Newegg Case Power Supply Deals & Case Power Supplies for Sale

This basic AT power supply suits older or retro PC builds where you need a reliable, no-frills replacement rather than modern ATX features. It's a straightforward pick for hobbyists restoring vintage systems that require the original AT form factor and connectors. Buy Now at Newegg

Anyone running a multi-GPU mining rig or power-hungry build needs headroom like this, and 2,600W gives you enough overhead to add cards later without upgrading your PSU again. Buy Now at Newegg

This power supply module is a solid pick if your rack setup needs reliable, redundant power without overhauling the whole system, since it slots in as a backup source that kicks in automatically if the primary fails. Newegg's listing makes it easy to source a compatible replacement or add-on unit without hunting down the manufacturer directly. Buy Now at Newegg

Anyone building or upgrading a high-end gaming or workstation rig with multiple GPUs will appreciate the 1,300W capacity here, and the full-modular cabling means you only plug in what you actually need. Platinum efficiency also keeps waste heat and power costs down compared to lower-rated supplies at this wattage. Buy Now at Newegg

For anyone repairing or upgrading an HP Z230 workstation, this 400W power supply is a direct replacement that gets your machine back up and running without hunting down a generic substitute. Newegg carries it as a straightforward parts option for those who already know exactly what their tower needs. Buy Now at Newegg

Anyone still running an older Vostro 270S desktop will want this on hand, since finding an exact-spec replacement PSU for a discontinued model isn't always straightforward once the original one fails. Buy Now at Newegg

Small form factor builds and quiet home theater PCs are where this one earns its keep, since a Platinum rating means less wasted heat and lower fan noise under load than you'd get from a standard bronze or gold unit. Buy Now at Newegg

Suits anyone building or repairing an HP Z6 G4 workstation, since this power supply is matched to the system's specific power and connector requirements rather than a generic PC replacement. It's worth having on hand for heavier workloads that push the workstation's GPU and CPU closer to full draw. Buy Now at Newegg

Anyone building or upgrading a mid-to-high-end desktop will want stable, sufficient wattage without overpaying, and this 800W unit from FSP covers that ground for most gaming or workstation builds. Buy Now at Newegg

This power supply is a direct replacement for systems originally built around the PC8019, PC8027, or HP-D2402E0 units, so it suits anyone repairing or upgrading a prebuilt desktop rather than piecing together a custom rig. Matching the exact model number matters here, since PSU form factors and connectors vary between OEM builds. Buy Now at Newegg

Handy for anyone running a Dell T3610 workstation whose power supply has failed or is on its way out, since sourcing an exact-fit replacement for these specific tower models can otherwise be a hassle. Buy Now at Newegg

Small form factor Dell desktop owners dealing with a dead or failing PSU will want this, since it's built to the exact specs of the OptiPlex 780, 790, 990, 7010, and 9010 rather than a generic universal fit. Buy Now at Newegg

Suits builders who need a reliable 850W supply without paying for higher-tier certification, and Newegg has it at $55, a 45% cut from the $100 list price. Buy Now at Newegg

Server builders and PC hobbyists swapping out a failing power supply will want to check the specs match, since this Delta 550W unit is designed as a direct replacement rather than a general upgrade pick. Buy Now at Newegg

Anyone building a compact server or rackmount setup will want this for its space-saving 1U flex form factor that still delivers reliable 500W output without hogging room in the chassis. Buy Now at Newegg

Anyone maintaining or repairing an M10-1 server will want a compatible replacement on hand, since sourcing the correct DPS-770CB model matters for proper fit and power delivery. Buy Now at Newegg

Anyone running an older PowerEdge R710 or T610 server needs a compatible replacement to keep things running when the original power supply fails, and this 570W unit fills that role without requiring a full server upgrade. Buy Now at Newegg

Anyone running or expanding a Juniper switch chassis will want this as a reliable spare or replacement, since power supply failures shouldn't take down your entire network setup. Buy Now at Newegg

Anyone running or expanding HPE networking gear will want a compatible power source on hand, and this 1,050W 54VDC unit is built specifically to keep those systems running without compatibility guesswork. Buy Now at Newegg