iUniker 27W PD USB-C Switch Power Supply for vs Rosewill VSB 650W 80+ Bronze, ATX 3.0 & 3.1
Updated August 2026 — iUniker 27W PD USB-C Switch Power Supply for wins on compatibility and size, Rosewill VSB 650W 80+ Bronze, ATX 3.0 & 3.1 wins on warranty and power output.
The iUniker 27W power supply is ideal for Raspberry Pi users seeking affordability and compactness, while the Rosewill VSB 650W is better suited for high-performance systems. Choose based on your specific power needs.
Why iUniker 27W PD USB-C Switch Power Supply for is better
Price
iUniker is significantly cheaper at $13.99.
Size
iUniker is smaller and designed for Raspberry Pi.
Simplicity
iUniker offers a straightforward USB-C connection.
Why Rosewill VSB 650W 80+ Bronze, ATX 3.0 & 3.1 is better
Power Output
Rosewill provides 650W, suitable for high-performance systems.
Safety Features
Rosewill has a comprehensive six-protection suite.
Cooling Performance
Rosewill includes a 120mm silent fan for better cooling.
Overall score
Specifications
| Spec | iUniker 27W PD USB-C Switch Power Supply for | Rosewill VSB 650W 80+ Bronze, ATX 3.0 & 3.1 |
|---|---|---|
| Compatibility | Raspberry Pi 5 | ATX 3.0 & 3.1 |
| Protection | Basic protections | Six protections |
| Fan | None | 120mm ICB fan |
| Technology | GaN | 80 PLUS Bronze |
| Modularity | Non-modular | Semi-modular |
Dimension comparison
Price Comparison
When it comes to price, the iUniker 27W PD USB-C Switch Power Supply is significantly cheaper at $13.99 compared to the Rosewill VSB 650W 80+ Bronze, which retails for $49.98. This represents a price difference of $35.99, making the iUniker about 72% less expensive. If budget is your primary concern, the iUniker power supply offers a more cost-effective solution for powering a Raspberry Pi 5. On the other hand, the Rosewill power supply's price reflects its higher power output and additional features, catering to users who may need more robust power solutions for gaming or high-performance computing.
Compatibility
The iUniker 27W PD USB-C Switch Power Supply is specifically designed for the Raspberry Pi 5, making it an ideal choice for those who own this single-board computer. It supports all variants of the Raspberry Pi 5, including the 2GB, 4GB, 8GB, and 16GB models. In contrast, the Rosewill VSB 650W 80+ Bronze is a semi-modular power supply that is suitable for a wider range of systems, including high-end gaming rigs and workstations thanks to its ATX 3.0 and 3.1 compatibility. This makes the Rosewill a more versatile option for users looking to power multiple components beyond just a single Raspberry Pi.
Power Output
In terms of power output, the Rosewill VSB 650W offers a substantial 650 watts, which is ideal for demanding systems that require significant power. The iUniker 27W PD USB-C Power Supply provides 27 watts, sufficient for the Raspberry Pi 5 but far less than what is needed for a full desktop setup. If you plan on running high-performance graphics cards or multiple drives, the Rosewill is the clear winner. However, if your needs are limited to a single Raspberry Pi, the iUniker's output is perfectly adequate.
Technology and Efficiency
The iUniker power supply utilizes GaN technology, which allows it to be smaller while maintaining high efficiency. This technology is designed to reduce heat generation and improve stability, making it an excellent choice for those who prioritize compact form factors. The Rosewill power supply, certified with 80 PLUS Bronze status, ensures high efficiency and reliability as well, but with a more traditional design. While both products focus on energy efficiency, the iUniker’s advanced technology provides a modern edge for smaller applications.
Safety Features
Safety is paramount when it comes to power supplies. The iUniker power supply is equipped with over voltage, over current, and short circuit protection, ensuring stable operation and safety for the Raspberry Pi. The Rosewill VSB 650W also boasts a comprehensive safety shield that includes six protection features: Over Current Protection (OCP), Over Power Protection (OPP), Over Temperature Protection (OTP), Over Voltage Protection (OVP), Short Circuit Protection (SCP), and Under Voltage Protection (UCP). While both products offer solid safety measures, the Rosewill’s extensive protections might appeal more to users with complex systems looking for added security.
Cooling Performance
Cooling performance is another critical factor to consider. The iUniker 27W power supply features an integrated LED indicator power switch, which helps in monitoring its operation but does not specifically mention any dedicated cooling features. In contrast, the Rosewill VSB 650W includes a 120mm ICB silent fan and a steel shell with large vents, enhancing cooling performance significantly. If you're building a system that will be under heavy load for extended periods, the Rosewill’s superior cooling capabilities can help keep the system stable and efficient.
User Experience and Design
User experience can vary significantly between these two power supplies. The iUniker is designed with simplicity in mind, featuring a straightforward USB-C connection and a compact layout, making it easy to use with the Raspberry Pi. The Rosewill power supply, while semi-modular, offers a more complex setup with dedicated cables for modern graphics cards and a compact build that allows for flexibility in small-form-factor integration. Users who prefer a plug-and-play experience may find the iUniker more appealing, while those looking for customization and scalability might lean towards the Rosewill.
Which should you buy?
In conclusion, your choice between the iUniker 27W PD USB-C Switch Power Supply and the Rosewill VSB 650W 80+ Bronze depends largely on your specific needs. If you are a Raspberry Pi user seeking an affordable, compact, and efficient power solution, the iUniker is the clear choice at just $13.99. However, if you're building a high-performance PC or require a power supply capable of handling demanding components, the Rosewill, priced at $49.98, offers superior power output, efficiency, and safety features. Ultimately, weigh your requirements against the capabilities of each product to make the best decision for your setup.

