It is a common dilemma that is it possible to fit ITX Case with ATX PSU or not?
Your dilemma point is not an exaggeration or any rare case. Many people like you often fall on this kind of trap. So, you need a proper direction right now.
In fact, you will get the exact solution to this dilemma from this entire article. Let’s explore.

Is It Possible to Fit ‘ITX Case with ATX PSU?’
It is a rare case that An ATX PSU can fit in the ITX case. But in some instances, it may be possible. In contrast, it is possible enough to set up a mini ATX PSU in the ATX case.
The fact is nothing but the size of the PSU. An ATX PSU is generally 15 cm in width, 8.6 cm in height, and 14 cm in diameter. A usual ITX case does not support this dimension.
But some instances, manufacturers’ do not maintain the actual dimension. In this fact, An ATX PSU can fit in ITX Case. Otherwise, you will not be allowed this kind of matching.
So, what can be the understanding about your condition of PSU and the condition of Case? You need to check the compatibility of your desired PSU with the related Case. Here in blow, I will disclose the process in detail.
How to Check Compatibility Between PSU and Case?
You can check compatibility between PSU and Case either manually or systematically. Manually means following the manufacturers’ specifications and size details.
On the other hand, you can check it from the pcpartpicker website. I will attach the process step by step below.
Step 1
Firstly you have to go to the website.
Step 2
Click on the ‘Start Your Build’ tab. You will find it on the top of the web pages.
Step 3
Then scroll down to find the ‘Power Supply’ section. You will see the ‘+ Choose A Power Supply’ tab just under the section. Tap on it.
Step 4
After that, find and select your preferred ATX PSU from the appeared list. Click on the selected item.
Step 5
Next, scroll down to the bottom and click on the ‘View Compatible Cases’
Step 6
Finally, you have to check which cases will be compatible with your selected PSU (Power Supply Unit).
Frequently Ask Questions (FAQs)
Can any PSU fit in any case?
No. any PSU can’t fit in any case. But relatively lower dimension-based PSU can fit in any type of Case. On the other hand, a higher dimension-based Case is compatible with any kind of PSU.
Are all ATX PSU the same size?
Almost all ATX 12V PSU manufacturers maintain the same physical shape and size. In rare cases, it can be different too.
Does all PSU have the same size?
No, all PSU have not the same size. It mainly depends on the capacity of a PSU.
Final Words
In the end, I hope that you would overcome the dilemma of the ITX case with ATX PSU compatibility from your side. Now, choose the best option to get the topmost feedback from your PC according to your budget.
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