Genuine Athena AP-MPS3ATX40 400 Watt Micro PS3 Power Supply - Upgrade

Our review of the Genuine Athena AP-MPS3ATX40 finds it best suited for DIY builders and technicians who need a reliable 400W upgrade or replacement for older HIPRO HP-D3537F3R LF, H units. The bottom line: this Micro PS3 unit delivers steady power with a useful PCI-E 6-pin for an extra VGA card and thermal fan speed control that responds to system heat. For anyone assembling a mini-ATX case, refurbishing compatible Dell, HP, IBM, Compaq or Gateway machines, or building a compact mini-server, the Athena offers a straightforward, higher-capacity alternative to stock low-wattage PSUs.

Key Features

• 400 Watt Upgrade: Raises overall system power to 400W, giving headroom for mid-range components and modest expansion.
• Broad Compatibility: Works as a replacement in many Dell, HP, IBM, Compaq, and Gateway systems or in new mini-ATX builds for greater flexibility.
• PCI-E 6-pin Connector: Supports an additional VGA card so users can add discrete graphics without a major PSU swap.
• Thermal Fan Speed Control: Fan adjusts to the amount of heat generated by the computer, reducing noise at low load and increasing cooling as needed.
• ATX Motherboard Support: Designed to support current ATX motherboards V2.2 and lower, suitable for a range of legacy and newer systems.
• Micro PS3 Form Factor: Compact size fits mini-ATX cases and many proprietary chassis that accept Micro PS3 supplies.

Who It's For

The Athena AP-MPS3ATX40 is ideal for technicians and hobbyists who need a higher-capacity replacement for HIPRO HP-D3537F3R LF, H power supplies or who are assembling compact systems where full-size ATX units do not fit. It suits small business servers, home lab machines, and owners of older branded desktops seeking a dependable power upgrade.

Users who require modular cables, extremely high wattage for multi-GPU rigs, or full modern power certifications should look elsewhere, as this product targets compatibility and compact builds rather than top-end enthusiast features.

Pros & Cons

Pros

• Solid 400W output that supports modest upgrades and extra components.
• PCI-E 6-pin connector allows adding a discrete VGA card without replacing the PSU.
• Thermal fan speed control balances cooling and noise based on system heat.
• Compact Micro PS3 design fits mini-ATX and many proprietary chassis.

Cons

• Fit and size receive mixed feedback from customers, so confirm chassis compatibility before purchase.
• Not aimed at high-end gaming rigs that need higher wattage or specialty connectors.

Specifications

Brand	Athena
Model	AP-MPS3ATX40
Rated Power	400 Watt
Compatible With	HIPRO HP-D3537F3R LF, H; many Dell, HP, IBM, Compaq, Gateway PCs
Form Factor	Micro PS3 / mini-ATX compatible
Motherboard Support	ATX V2.2 and lower
Notable Connector	PCI-E 6-pin for VGA card

Our Verdict

The Genuine Athena AP-MPS3ATX40 is a practical 400W upgrade for compact and branded desktop systems, offering a useful PCI-E connector and thermal fan control for balanced cooling. It represents solid value for those replacing HIPRO power supplies or building mini-ATX systems, though buyers should verify fitment for their specific case before ordering.

Frequently Asked Questions

Will this fit my Dell or HP desktop?
It is designed for many Dell and HP models that accept Micro PS3 supplies, but customers should compare physical dimensions and connector layout with their original unit to ensure fit.

Can this power a modern graphics card?
The included PCI-E 6-pin connector supports an additional VGA card, suitable for modest discrete GPUs but not high-end multi-GPU configurations requiring extra power.

Does the fan run loudly?
Thermal fan speed control adjusts fan RPM to heat output, so it stays quieter at low load and increases speed under heavier use.