A Power Supply (PSU) is responsible for supplying D.C. current to all the parts of a computer. One question that most people who are building PCs for the first time ask about PSU is how much PSU wattage they actually need? And if they choose a PSU with a higher wattage than the PC needs, does it consume more electricity?
I can relate to these questions because years ago when I was choosing parts for my first PC I was also thinking about these questions. And over time, after using them for decades, I have realized some interesting things about them. Let’s discuss in detail in this post:
Does A Higher Watt PSU Use More Electricity?
A power supply (PSU) with higher wattage doesn’t consume more electricity than the PC needs. So, if a PC needs 500W power but it has a 750W PSU inside, In that case, the power consumption will be 500W only. Having a PSU with slightly more wattage than recommended can give better results in overclocking.
So, if you are going to overclock your PC, having a PSU that is a bit overkill can be surprisingly better. Otherwise, going with normal PSUs from a good brand will be enough for normal computers.
Basically, power supplies that come with a higher wattage than the PC need don’t consume more electricity. In fact, if you buy a higher watt PSU from a good brand, it can consume less power as their efficiency will more likely be higher than the budget ones.
So, let’s discuss in detail what factors can affect the power consumption of a power supply:
Things That Matters In A PSU Power Consumption:
Except for the wattage of a power supply, some other important things matter and affect the power consumption. If you carefully apply these points while choosing a PSU you can get an efficient PSU for your PC.
PSUs basically convert AC to DC and for this conversion process, a lot of energy is wasted through heat. It is normal if some amount of electricity is wasted in this conversion process, but if a PSU is wasting 30%-40% energy then it can not only spike up the power consumption but also heat generated.
So, all the PSUs are not efficient, and depending on this the power consumption also varies. For example, if a PC needs 500W power, to supply power to that PC an efficient PSU will always consume less electricity than a not efficient one.
That’s why based on the PSUs efficiency, they are categorized differently. Like 80 Plus Bronze, 80 Plus Silver, 80 Plus Gold, 80 Plus Platinum, 80 Plus Titanium. TIll now, 80 Plus TItanium is the best power efficiency rating.
And depending on different loads, its efficiency varies around 90%, 92%, 94%. So, if you get a PSU with higher efficiency, then obviously you are going to save electricity but keep in mind they cost a bit more than less efficient PSUs.
RGB Is Power Hungry:
Having RGB in PCs is very important to some users (including me:). As RGB is coming nowadays with budget products also, so more and more users are using it.
Who doesn’t want to have beautiful lighting on their PCs?
But there is one problem with these RGB components, they consume more electricity.
That’s why if you have tons of RGB components in your PC, it will be better if you have a slightly higher Watt PSU than recommend. Otherwise, it can create power deficiency or throws errors if you don’t have minimum power requirements, and you overclock and have RGB lighting.
High-end PC Parts:
Generally, more powerful parts that give better performance also consume higher power. Talking about power consumption, the graphics card is the most power-hungry part of the entire PC.
That’s why it is important to have a PSU that can quench the thirst of the GPU. So, make sure to get a PSU that can give slightly higher power than the recommended in case you overclock. In this case, having a higher watt PSU is not a bad idea or a not waste of money.
These are the main factors that can affect the power consumption of a PSU. Now, let’s also have a look at some questions that people often ask about this topic.
Is Higher Wattage PSU Better?
Slightly higher PSU wattage can give better performance in case of overclocking or while doing high-power-consuming tasks. But having a PSU that is overkill for the PC can’t give any noticeable improvement.
So, although it is better to have a slightly higher wattage PSU, having one with too high specs also doesn’t make sense. That’s why you have to find the sweet spot according to your system parts.
I recommend having not more than 50W-100W higher PSU than recommended, otherwise, you have to spend more money which obviously doesn’t worth it.
What Happens If PSU Wattage Is Too High?
If a PSU wattage is too high it won’t affect the performance and power consumption. So, everything will run like a normal PC. Still, generally higher wattage PSUs (from good brands) do have higher efficiency ratings, in that case, users might see low power consumption.
However, nowadays lower PSUs with wattage also do have higher efficiency ratings (from good brands). So, you just have to select the perfect one, otherwise, you will be spending a lot more money.
Does A 750 Watt PSU Use More Electricity?
No, a 750W PSU will only consume the electricity that the PC actually needs. If a PC needs only 500W power, then it will only consume 500W from 750W. If the PSU wattage is less than 500 in this case, the PC won’t run.
Does A 1000W PSU Use More Electricity?
1000W PSUs are huge and in most cases, they are not required for normal PCs. So, if the user has a very power-hungry GPU and CPU, or small servers then only this much wattage makes sense. Like others, a 1000W PSU also doesn’t use more electricity.
I hope after reading this post, your queries about using a higher watt PSU is cleared, if you have any further questions or can’t choose the PSU, feel free to reach us, see you in the next one, be techy:)
I am the co-founder of untoldtech, it’s all about knowing and adapting to the new technology and using them in our favor.