New Slimline Power Supply Upgrade for SFF Desktop Computer - 300W

In this review of the New Slimline Power Supply Upgrade for SFF Desktop Computer, the bottom line is simple: this 300W TFX power supply is for owners of slimline or small form factor desktops who need more headroom for additional drives or accessories. It replaces lower wattage units like the Delta DPS-220AB-2 and DPS-250AB-28 and offers a straightforward upgrade path with a full complement of connectors. The reviewer found it practical for compatibility and power but notes tradeoffs in build feel and cooling noise.

Key Features

• Compact TFX form: fits slimline cases designed for TFX power modules so it replaces many brand slimline units without modification.
• 300 Watts total: provides additional wattage to support extra hard drives, optical drives and modest upgrades compared with lower wattage stock supplies.
• Full connector set: includes 20+4 pin main, 12V P4, 3 SATA, 2 Molex and a floppy connector so it supports a wide range of legacy and current peripherals.
• Dual 12V rails: two +12V rails help distribute load for components and reduce single-rail overload risk in mixed device configurations.
• Active cooling: internal 40mm ball-bearing fan with thermal speed control keeps the unit within rated temperatures under load.

Who It's For

This power supply is aimed at users with small form factor desktops that originally shipped with Delta DPS-220AB-2, DPS-250AB-28, or similar TFX units who need extra power for additional SATA drives or modest expansion cards. It is appropriate for home office machines, media PCs and retrofit projects where space is limited.

Users who prioritize ultra-quiet operation or who require premium component quality for heavy gaming or workstation use should look elsewhere, since the unit is designed as a compact, value-oriented upgrade and some users report noticeable fan noise and mixed impressions of construction quality.

Pros & Cons

Pros

• Good compatibility with slimline models and a complete set of connectors for SATA and legacy devices.
• Higher 300W capacity gives room for additional drives and modest upgrades without replacing the case.
• Thermal fan control and a ball-bearing fan provide active cooling in a compact package.

Cons

• Some buyers report the fan is loud under load, which may be noticeable in quiet rooms.
• Build quality impressions are mixed, so buyers seeking premium construction may prefer a branded high-end unit.

Specifications

Form Factor	TFX slimline
Rated Power	300 Watts
Voltage Rails	+3.3V@13A, +5V@13A, +12V1@9A, +12V2@9A, -12V@0.8A, +5VSB@2.5A
Connectors	1x20+4 pin, 1x4 pin 12V P4, 3x15 pin SATA, 2x4 pin Molex, 1x4 pin Floppy
Cooling	Internal 40mm ball-bearing fan with thermal speed control
Operating Temp	0C to +50C at full load

Our Verdict

The New Slimline Power Supply Upgrade is a pragmatic choice for SFF desktop owners who need reliable extra wattage and broad connector support without changing the case. It represents good value for modest upgrades and drive additions, though buyers should accept a compact design and the possibility of audible fan noise when pushing the unit.

Frequently Asked Questions

Will this fit my slimline desktop?
It is designed for TFX slimline form factor desktops and explicitly replaces Delta DPS-220AB-2 and DPS-250AB-28 style units, so it fits most compatible small cases.

Does it provide enough power for extra drives?
Yes, the 300W rating and multiple SATA connectors allow you to add several hard drives or optical drives beyond typical stock configurations.

Is the fan quiet?
Cooling is handled by a 40mm ball-bearing fan with thermal control; however several users report noticeable fan noise under load, so it may not be ideal for ultra-quiet builds.