Apevia ITX-PFC500W Mini ITX/Flex ATX / 1U 500W vs CORSAIR RM850e Fully Modular Low-Noise ATX Power
Updated July 2026 — CORSAIR RM850e Fully Modular Low-Noise ATX Power leads on length and fan size.
The CORSAIR RM850e offers superior efficiency and features, making it the better choice for high-performance builds. The Apevia ITX-PFC500W is a budget-friendly option for compact systems.
Why Apevia ITX-PFC500W Mini ITX/Flex ATX / 1U 500W is better
Price
Apevia is significantly cheaper at $49.99.
Size
Compact design suitable for small builds.
Basic Needs
Adequate for entry-level systems.
Why CORSAIR RM850e Fully Modular Low-Noise ATX Power is better
Efficiency
Cybenetics Gold certified for lower energy waste.
Cooling
Larger fan for quieter operation.
Protection
More robust safety features.
Overall score
Specifications
| Spec | Apevia ITX-PFC500W Mini ITX/Flex ATX / 1U 500W | CORSAIR RM850e Fully Modular Low-Noise ATX Power |
|---|---|---|
| Modularity | Fully Modular | Fully Modular |
| Max Power | 500W | 850W |
| Efficiency | N/A | Gold |
| Cooling | 40mm Fan | 120mm Fan |
| Protection | Basic | Advanced |
Dimension comparison
Overview
The comparison between the Apevia ITX-PFC500W and the CORSAIR RM850e highlights two distinct power supply units designed for different needs and budgets. The Apevia ITX-PFC500W is priced at $49.99, making it about 47% cheaper than the RM850e, which costs $94.99. This price difference sets the stage for a closer examination of features, performance, and suitability for various PC builds.
Design and Build Quality
The design and build quality of a power supply can significantly impact its reliability and efficiency. The Apevia ITX-PFC500W features a compact form factor suitable for Mini ITX and Flex ATX systems, measuring 160mm x 73.66mm x 35.5mm. Its small size is ideal for space-constrained builds, but it may limit airflow compared to larger units. In contrast, the CORSAIR RM850e, with a more conventional ATX size, provides a robust build that accommodates various case designs. The inclusion of 105°C-rated capacitors in the RM850e enhances its electrical performance and reliability, especially under heavy loads.
Efficiency and Performance
Efficiency is crucial for power supplies, impacting energy consumption and system performance. The CORSAIR RM850e is Cybenetics Gold certified, ensuring high efficiency and lower energy waste. This certification implies that the RM850e will consume less power, potentially lowering electricity bills over time. The Apevia ITX-PFC500W lacks such certification but still offers a maximum output of 500W, making it suitable for smaller builds. However, it does not match the efficiency standards set by the RM850e, which is designed to support high-performance components.
Modularity and Connectivity
Modularity in power supplies allows users to connect only the cables they need, reducing clutter and improving airflow. The CORSAIR RM850e is fully modular, providing a clean and efficient setup. It includes several connectors, such as a 12V-2x6 connector that is compliant with ATX 3.1 and PCIe 5.1 standards, making it future-proof for advanced graphics cards. The Apevia ITX-PFC500W is also fully modular but offers fewer connectors, including 2x 6+2 PCIE and 2x SATA. While it serves basic needs well, it may not support high-end systems as effectively as the RM850e.
Cooling Solutions
Effective cooling is essential for maintaining the longevity and performance of a power supply. The Apevia ITX-PFC500W utilizes a 40mm double ball bearing fan for forced air ventilation. While this cooling solution is adequate for its size, it may not be efficient enough for high-demand applications. On the other hand, the CORSAIR RM850e features a larger 120mm rifle bearing fan, which is designed to keep noise levels down even under full load. This quieter operation is a significant advantage for users seeking a silent PC experience.
Protection Features
Protection features in power supplies are vital for preventing damage to both the PSU and connected components. The Apevia ITX-PFC500W includes several protections, such as Overvoltage Protection (OVP) and Short Circuit Protection (SCP), ensuring safety during operation. However, the CORSAIR RM850e goes a step further with its industrial-grade capacitors and additional protection mechanisms, providing a more robust safety net. This comprehensive approach to safety makes the RM850e a more reliable choice for high-performance systems.
Target Audience
Identifying the target audience for each power supply reveals their intended use cases. The Apevia ITX-PFC500W is designed for users with small form factor builds, such as budget gaming or POS AIO systems. Its lower price point makes it appealing for entry-level users or those looking for an economical solution. In contrast, the CORSAIR RM850e targets gamers and PC enthusiasts who demand high performance and reliability. Its advanced features and higher price point position it as a premium option for serious builds.
Which should you buy?
Deciding between the Apevia ITX-PFC500W and the CORSAIR RM850e ultimately depends on your specific needs and budget. If you are building a compact system on a tight budget, the Apevia ITX-PFC500W at $49.99 is about 47% cheaper and may serve your purposes well. However, for those seeking a power supply that offers higher efficiency, a quieter operation, and advanced features for high-performance systems, the CORSAIR RM850e at $94.99 is the superior choice. Its enhanced connectivity options and protection features justify the higher price for serious users.

