How to Choose a PC Power Supply

November 23, 2021
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It is one of the most important and least fascinating PC components. Of course, PCs require energy, which isn’t delivered directly from the wall to every component. Instead, the power company’s AC is converted to the appropriate voltage DC for PC components.

Buying a power supply for your PC is tempting, but not wise. Instability can be caused by unreliable or dirty power supplies. In reality, a failed power supply might produce inexplicable problems like random resets and freezes. So choose your power supply with as much care as your CPU, GPU, RAM, and storage. Choosing the optimal power supply for your needs will maximise performance and reliability.

Power output: How much do you need?

While there are various aspects to consider when choosing a power source, recognising one of the most critical is refreshingly simple. You don’t need to read benchmarks or evaluations to figure out how much power you need. Rather, use a power supply calculator like Newegg’s to figure out how much power your new supply needs to output.

For each category, you must select your components from the drop-down lists. Omron electronic components Malaysia is updated with the latest options for CPU, motherboard, GPU, RAM, and more. Even though it doesn’t dive down into every component, the tool helps you determine how much power you need.

For example, a Ryzen7 Series CPU, Nvidia GeForce RTX 2060 GPU, 16 GB of RAM split into two 8GB sticks, a 256GB SSD, and a 1TB 7200RPM HDD require 576 watts of power. To be safe, use a 600-watt power supply — and you can get one with only a few clicks.

What is 80 PLUS certification?

Many power supplies have 80 PLUS certification marks. 80 Plus is a certification programme that manufacturers can use to ensure their power supply fulfil efficiency standards. Independent labs grade power supplies to give efficiency levels for consumer 115-volt power systems. 

When buying a power supply, look for 80 PLUS accreditation. That makes it easier to fine-tune your new PC’s efficiency.

Form factor – Will your power supply fit?

The next step is to choose a form factor that will physically fit into your case. Fortunately, power supplies, like cases and motherboards, have standards.

It’s crucial to note that your power supply should match your case and motherboard. Here is a general review of today’s most used power supply forms.


A power supply is useless unless it can connect to and power all PC components. It must have all needed connector types.

The main power connector for the motherboard is the first to consider. There are two types: 20-pin and 24-pin. This second option is becoming more common, and your power supply likely offers both. Just double-check.

A 4-pin or 8-pin processor power connector is next. Many recent motherboards have the bigger format main power connection. Again, check your power supply.

The most common power connector is the 4-pin Molex. It’s used for old HDDs, optical drives, fans, and other devices. If you run out of SATA power connectors, you can utilise Molex to SATA adapters. You can also use splitter cables to connect more components, but keep in mind your power supply’s maximum capacity.

Time to power up

Choosing a power supply is a big consideration when building a new PC. Spending a little time now to ensure your power supply delivers reliable, consistent, and save electricity to your PC components will save you time later on and make your PC a better and more efficient machine.

You can look up Omron power supply Malaysia if you are looking for a place to start.

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