WHAT IS A POWER SUPPLY UNIT (PSU)?
A Power Supply Unit (PSU) is an internal computer hardware component that doesn’t provide power to systems but rather converts it. The PSU changes the alternating current (AC) into direct current (DC) and precisely regulates the DC output voltage for the use of modern computer components.
Most power supplies utilize switched-mode technology, which offers improved efficiency and allows for design versatility in handling various voltage inputs. This versatility enables PSUs to be used in different regions where the power supply voltage may vary. For example, the voltage in the USA is 120V 60Hz, while it’s 240V 50Hz in the UK and 230V 50Hz in Australia.
In addition to server power supply units, REF Group can also provide PC, laptop, and desktop PSUs. If your business requires these types of power supplies, please contact us and let us know your requirements. Although our focus is mainly on server PSUs, we will make every effort to meet your needs.
WHEN DO I NEED A PSU?
The power supply unit is a vital component of any server, without which the IT infrastructure would fail to function. As a result, it is common for a power supply to be included with most systems at the time of purchase.
However, in certain situations, there is an option that can be used instead of the PSU. Power over Ethernet (PoE) allows electrical power to be transmitted through network cables, eliminating the need for a connection to a power outlet. This solution is ideal for systems that require greater mobility as PoE provides wireless access points wherever they are needed and reduces the amount of space occupied by wiring.
HOW DO I CHOOSE THE RIGHT PSU FOR MY SYSTEM?
When selecting a power supply unit, the first consideration should be ensuring compatibility with the form factor of your server case and motherboard to guarantee a proper fit within your server. The second important factor to take into account when choosing a power supply unit is the wattage. The wattage rating determines the amount of power that the unit can supply to your system. Thus, it is necessary to assess the power needs of your components to ensure they run efficiently. For example, if your components require 600W, it would be advisable to purchase a 1200W power supply unit, as most power supplies operate with the greatest efficiency at around 50% load. This also provides the flexibility to add additional components to your system in the future if necessary.
Finally, when replacing or upgrading the power supply unit for a PC, it is essential to consider the brand. Some well-known power supply brands are Corsair, Antec, EVGA, and Seasonic. The decision often depends on personal preference, compatibility with your system, and the purpose of the power supply (e.g. gaming, business use, or personal use). A useful tip is to look for a power supply with an 80 Plus Platinum rating, as it offers high energy efficiency and can minimize energy costs.
HOW EFFICIENT SHOULD MY POWER SUPPLY BE?
The 80 Plus system rates the efficiency of power supplies, starting from 80 Plus and 80 Plus Bronze and reaching 80 Plus Titanium. The term “80 Plus” implies that the power supplies within this range have a minimum efficiency of 80%, while higher levels like 80 Plus Platinum and 80 Plus Titanium can provide up to 94% efficiency when operating at 50% load.
Current 80 Plus power supplies work optimally with high wattage and therefore 80 Plus Gold, Platinum, and Titanium (with efficiency up to 94%) are suitable for large data centers. For PCs and desktop computers, 80 Plus Silver and lower-level power supplies (with maximum efficiency of 88%) are more appropriate. It’s crucial to keep in mind that a 2% difference in efficiency ratings, such as between 90% and 92%, can greatly impact energy consumption in large data centers.
DO I NEED MORE THAN ONE PSU?
To sum up, a server must always have at least two power supplies. The way they operate can vary based on the level of redundancy required for the system. One option is to have a completely redundant power supply setup, with one PSU always inactive and a backup available in the event of failure. Another option is to have shared power supplies that both operate simultaneously and share the load.
For optimal backup, it’s advisable to have an Uninterruptible Power Supply (UPS) that allows the computer to continue operating temporarily in the event of a power outage. There are three types of UPS: online, offline, and line-interactive. An online UPS maintains consistent power quality, while an offline UPS kicks in when power is lost, with a slight lag. The line-interactive type combines features of both and offers more power protection through line conditioning.
EXPERT IT ADVICE WITH REF GROUP
REF Group specializes in eco-friendly IT solutions and has a highly rated team with over 5 years of experience in purchasing, reconditioning, and selling various IT products, such as servers, storage devices, networking gear, laptops, and personal computers. Check out our collection of power supplies for servers or feel free to reach out to us for any assistance.