250W Power Supply for Optiplex & Inspiron Slim DT Systems - Reliable

In this review of the 250W Power Supply compatible with Optiplex 390/790/990 and various Inspiron and Vostro Slim DT systems, the bottom line is simple: this is a practical, no-frills replacement for users who need a direct-fit unit to restore a desktop quickly. It is aimed at technicians and owners of legacy Dell small-form-factor and slim desktops who value compatibility and straightforward installation. The single biggest reason to buy is the wide list of compatible model and part numbers that make swapping old or failed units easy and predictable.

Key Features

• Broad compatibility: Works with many Dell Optiplex, Inspiron, Vostro and Studio Slim DT systems so you can replace an original unit without modification.
• 250W maximum output: Provides consistent power for standard small-form-factor configurations and typical office components.
• Multiple connectors: Includes a 24-pin ATX, 4-pin ATX and several SATA power connectors to feed motherboard and multiple drives directly.
• Wide AC input range: Accepts 100-240V~/4.4A at 50-60Hz, so it works in different mains environments without a voltage switch.
• Match to known part numbers: Compatible with many OEM part numbers and model codes, reducing guesswork when ordering a replacement.
• Easy swap installation: Physical fit and connector layout mirror original Dell slim desktop supplies for quick installation.

Who It's For

This unit is best for home users, IT technicians, or refurbishers working on older Dell small-form-factor and slim desktop machines such as the Optiplex 390/790/990, Inspiron 537s/540s line, and Vostro 200/220 series. If the original supply has failed and the PC needs a like-for-like replacement, the broad compatibility list and standard connectors make this a sensible choice.

Those who should look elsewhere include users planning high-performance upgrades, gaming rigs, or systems with demanding GPUs because the 250W maximum and slim form factor are intended for modest office or media setups rather than power-hungry components.

Pros & Cons

Pros

• Direct compatibility with many Dell model and part numbers simplifies replacement.
• Multiple SATA connectors and standard motherboard plugs reduce the need for adapters.
• Accepts global AC input voltages for use in varied locations.
• Several customers report easy installation and reliable functionality restoring their systems to working order.

Cons

• Some users report fan bearing noise on a minority of units, so acoustic performance can vary.
• As a 250W slim supply it is not suitable for upgraded, high-power components.

Specifications

Brand	IMSurQltyPrise
Max DC Output	250W
AC Input	100-240V~ 4.4A 50-60Hz
Primary Connectors	24-pin ATX, 4-pin ATX, SATA power connectors
Compatible Systems	Optiplex 390/790/990, Inspiron 537s/540s/560s, Vostro 200/220/230/260/400
Compatible Part Numbers	Includes CYY97, 7GC81, HY6D2 and many OEM codes

Our Verdict

This 250W replacement power supply is a practical and cost-effective solution for owners of older Dell slim desktop and small-form-factor systems who need a dependable, direct-fit unit. It covers a long list of compatible part and model numbers, offers standard connectors and worldwide AC input, and represents good value for restoring office or home machines, provided acoustic variability and the 250W power ceiling fit the intended use.

Frequently Asked Questions

Will this fit my Optiplex 790?
Yes, it is listed as compatible with Optiplex 790 and other similar small-form-factor Dell systems that use the same connector layout.

Can this power a discrete graphics card?
Not recommended for high-power GPUs; the 250W maximum is intended for typical office or light multimedia configurations.

Does it work worldwide?
Yes, the supply accepts 100-240V~ at 50-60Hz so it will operate on common mains voltages without manual switching.