290W Power Supply Replacement for Dell Optiplex 3020 7020 9020 - MT

In this review of the 290W Power Supply Replacement for Dell Optiplex 3020 7020 9020 and compatible towers, the bottom line is simple: it is a practical, affordable direct-replacement for MT mini tower systems that need a 290W OEM-style unit. The reviewer found it best for users who need a straightforward swap for a failed or missing supply and who can confirm the part or model number first. Installation is generally simple and it restores full DC output capacity for supported Dell Optiplex and Precision/PowerEdge towers.

Key Features

• Broad compatibility: Works with multiple compatible P/N and M/N identifiers so it can replace a range of original Dell units without modification.
• Correct form factor: Designed for MT mini tower systems only, ensuring a physical fit in Optiplex 3020/7020/9020 and Precision T1700 or PowerEdge T20 towers.
• Reliable power rating: Provides up to 290W DC output to support standard desktop components in supported systems.
• Standard inputs: Accepts 100-240V AC at 50-60Hz and 5.4A input, so it will operate on common global mains voltages.
• Necessary connectors: Includes the required 4-pin and 8-pin wiring connectors to match the original Dell motherboard and peripheral connections.

Who It's For

This replacement is best for IT technicians, refurbishers, and owners of Dell Optiplex 3020, 7020, 9020 MT systems, Precision T1700 MT, and PowerEdge T20 towers who need a like-for-like power supply swap. It is suitable when the failed supply uses one of the listed part numbers or model numbers and the tower is the MT mini tower variant.

It is not for owners of USFF, SFF, or DT variants of Optiplex desktops; those smaller form factors use different power supplies and this unit will not fit. Buyers should check the original power supply part number and confirm the connectors match before purchasing.

Pros & Cons

Pros

• Easy installation makes it accessible for users comfortable opening a tower and swapping a PSU.
• Matches many compatible part and model numbers, reducing the risk of mismatch when replacing OEM units.
• Supports a full 290W DC output, adequate for typical office and business desktop configurations.

Cons

• Some customers reported mixed reliability, with a minority experiencing early failure within a few weeks, so longevity may vary.

Specifications

Brand	Ratuforez (compatible replacement)
Max DC Output	290W
AC Input	100-240V~ 50-60Hz 5.4A
Compatible Systems	Optiplex 3020/7020/9020 MT, Precision T1700 MT, PowerEdge T20
Connectors	Pin1: 4Wire 4Pin; Pin2: 8Wire 8Pin
Compatible Part Numbers	KPPG9, N0KPM, RVTHD, HYV3H, KGF74, HCTRF, XFXKX
Compatible Model Numbers	L290AM-00, L290EM-01, H290AM-00, H290EM-00, AC290AM-00, D290EM-00, D290A001L, PS-3291-1DB, PS-3291-1DF

Our Verdict

The 290W replacement is a sensible value for anyone needing a like-for-like swap in Dell MT mini towers: it restores proper power capacity, fits the intended chassis, and uses the correct connectors. Buyers should confirm part numbers and be aware that a small number of users reported early failures, but for routine office or business desktops this replacement is generally a practical and cost effective option.

Frequently Asked Questions

Will this fit my Optiplex?
It fits only MT mini tower variants such as Optiplex 3020/7020/9020 MT; it will not fit USFF, SFF, or DT models.

Does it provide enough power for a standard build?
Yes, the unit provides up to 290W DC output which is suitable for typical office and business desktop configurations in the supported systems.

How do I confirm compatibility?
Check your existing power supply part number or model number against the compatible P/N and M/N list and confirm the 4-pin and 8-pin connectors match before purchasing.