Overview
Delivering 500 watts via a dedicated 40-amp single +12V rail, this Flex ATX power supply addresses the intense spatial and electrical constraints of ultra-compact Mini-ITX chassis and 1U rack enclosures. The fully modular interface is a standout mechanical advantage in dense enclosures, eliminating unused cable clutter through standard 18 AWG harnesses including dual 6+2-pin PCIe connectors for discrete graphics compatibility. Electrical filtering is managed through a full-range Active PFC circuit operating across 90V to 264V, maintaining a verified minimum hold-up time of 16ms to ride out transient input voltage drops.
Thermal regulation relies on a high-endurance 40mm dual ball bearing fan designed for continuous forced-air cooling. Because the power conversion efficiency tops out at 80% without higher-tier 80 PLUS certification, thermal dissipation under sustained loads requires aggressive fan spin rates inherent to the compact 40mm diameter. Built-in industrial protections—including over-voltage, over-power, over-current, and short-circuit safeguards—pair with a 5-year manufacturer warranty to ensure operational durability. However, storage expansion remains strictly constrained by the provision of only two SATA connectors, necessitating careful peripheral planning for multi-drive NAS deployments.
Technical Specifications
| Brand | Rosewill |
| Model | VIT 500W |
| Form Factor | Flex ATX / Mini-ITX / 1U |
| Total Power Output | 500W |
| Modularity | Fully Modular |
| Efficiency Rating | Up to 80% |
| Input Voltage Range | 90–264V (Full Range) |
| PFC Type | Active PFC |
| +12V Rail Configuration | Single +12V (40A / 480W) |
| Hold Up Time | ≥ 16ms |
| Cooling Fan | 1 x 40mm Dual Ball Bearing Fan |
| Wiring Gauge | 18 AWG |
| Motherboard Connector | 1 x 20+4-Pin |
| CPU EPS Connector | 1 x 4+4-Pin ATX12V / EPS |
| PCIe Connectors | 2 x 6+2-Pin |
| SATA Connectors | 2 |
| Peripheral Molex Connectors | 2 x 4-Pin |
| Circuit Protections | OVP, OPP, OCP, SCP |
| Warranty | 5 Years |
- Fully modular cable design ideal for cramped Flex ATX and 1U enclosures
- Dedicated 40A single +12V rail delivering 480W with dual 6+2-pin PCIe connectors
- Durable 40mm dual ball bearing fan backed by a 5-year warranty
- Full-range Active PFC with industrial OVP, OPP, OCP, and SCP protections
- Base efficiency capped at 80% without higher 80 PLUS tier certification
- Limited storage connectivity with only two SATA power connectors
Recommended Alternatives in Power Supplies (PSUs)
At a Glance
How reliable is the Rosewill VIT 500W Review: Modular Cabling Meets Flex ATX according to Mizex audits?
Recommended for compact Mini-ITX gaming rigs and shallow 1U chassis requiring modular cable management, provided baseline 80% efficiency and minimal SATA ports fit your thermal and storage requirements.
What are the known quirks or drawbacks of the Rosewill VIT 500W Review: Modular Cabling Meets Flex ATX?
Our reliability audit identified the following documented caveats:
- Base efficiency capped at 80% without higher 80 PLUS tier certification
- Limited storage connectivity with only two SATA power connectors
What are the key engineering highlights of the Rosewill VIT 500W Review: Modular Cabling Meets Flex ATX?
The top strengths recorded in our evaluation include:
- Fully modular cable design ideal for cramped Flex ATX and 1U enclosures
- Dedicated 40A single +12V rail delivering 480W with dual 6+2-pin PCIe connectors
- Durable 40mm dual ball bearing fan backed by a 5-year warranty
- Full-range Active PFC with industrial OVP, OPP, OCP, and SCP protections