Can You Upgrade a Prebuilt PC?

Can you upgrade a prebuilt gaming PC?

The short answer is yes, but it's not always as simple as swapping parts the way you would with a custom-built system.

Some prebuilts are designed to be upgraded easily. Others can make even a basic upgrade much more complicated.

In this guide, I'll explain what parts you can upgrade, what limitations to watch for, and when upgrading a prebuilt PC actually makes sense.

At Apex Gaming PCs, you can start your build around the performance and hardware you actually want.

Can You Upgrade a Prebuilt PC or Are They Locked Down?

Not all prebuilts are created equal.

If you bought your PC from a boutique or custom gaming PC builder, you're more likely to be working with standard components, which makes upgrades pretty straightforward.

Big-box systems from companies like Dell or HP may use more proprietary parts that can limit what you can replace.

There are three main things you want to check:

• Are the components standard?
• Is there enough physical space for the new parts?
• Can your power supply and cooling support the upgrade?

Those three things will tell you a lot about how upgradeable your system actually is.

How Do You Check If Your Prebuilt PC Is Upgradeable?

Start by finding the exact model number of your PC.

Then look up the specifications and identify the motherboard, power supply, RAM type, case size, and storage options.

You also want to watch for things like proprietary connectors, unusual motherboard layouts, or custom cooling systems.

Those are usually signs that upgrades may be more difficult.

Compatibility is often the hardest part of upgrading a prebuilt, not physically installing the new part.

Which Parts Can You Upgrade in a Prebuilt PC?

Most prebuilts allow at least some upgrades.

RAM and storage are usually the easiest, while the CPU and motherboard tend to be more complicated.

Can You Upgrade the RAM?

RAM is usually one of the easiest upgrades.

You need to make sure you're using the correct memory type, such as DDR4 or DDR5, and that the motherboard supports the capacity you want.

Check how many RAM slots you have, what type of RAM the motherboard uses, and the maximum supported capacity.

If your system feels slow while multitasking, adding more RAM can make a noticeable difference.

In a lot of prebuilts, capacity matters more than chasing higher memory speeds.

Can You Upgrade the Storage?

Storage is another relatively easy upgrade.

You can replace an older hard drive with an SSD or add a faster NVMe SSD if your motherboard supports one.

Check your available M.2 slots, drive bays, and SATA connections.

If you're replacing your main drive, you'll also need to decide whether you want to clone your existing drive or do a fresh Windows installation.

Also keep in mind that many prebuilts don't include extra SATA cables, and new SATA drives don't always come with one.

Can You Upgrade the GPU?

Yes, you can usually upgrade the graphics card, but there are a few things you need to check first.

Does the case have enough physical space?

Does the power supply have enough wattage?

Does it have the correct power connectors?

And can the case provide enough airflow for the new GPU?

If all of that checks out, a GPU upgrade can provide one of the biggest improvements in gaming performance.

Can You Upgrade the CPU?

CPU upgrades are more restrictive.

The processor has to match your motherboard's socket and chipset, and the motherboard also needs BIOS support for the CPU you're installing.

Sometimes you'll need to update the BIOS before installing a newer processor.

A more powerful CPU may also require better cooling.

So while a CPU upgrade is possible in some prebuilts, it isn't always practical.

Can You Upgrade the Power Supply?

If you're upgrading your GPU, you may also need a stronger power supply.

If your prebuilt uses a standard ATX power supply, the upgrade is usually pretty straightforward.

Some Dell, HP, and other OEM systems use proprietary power supplies or connectors, which can make replacing them difficult or sometimes impossible.

That matters because a weak power supply can limit your entire upgrade path.

Can You Upgrade the CPU Cooler?

A better CPU cooler can improve temperatures and reduce noise.

The main things to check are mounting compatibility and case clearance.

Air coolers are usually simpler.

If you want to install an AIO liquid cooler, you'll also need enough room in the case for the radiator.

Can You Upgrade the Motherboard?

Technically, yes.

But once you start replacing the motherboard, you're basically rebuilding the PC.

A motherboard replacement can also mean changing the CPU, RAM, power supply, or even the case.

At that point, it usually isn't the smartest individual upgrade.

Can You Move a Prebuilt PC Into a New Case?

You can move a prebuilt into a new case, especially if you need more space or better airflow.

But OEM systems can make this difficult because of proprietary motherboard layouts, connectors, or front-panel cables.

Before buying a new case, make sure the parts in your current system can actually be transferred.

What Usually Stops You From Upgrading a Prebuilt PC?

The biggest limitations are usually proprietary components, weak power supplies, small cases, poor airflow, and limited BIOS support.

Any of those can turn what looks like a simple upgrade into a much bigger project.

Storage upgrades can also become more complicated because you need to think about moving your data, not just installing the new drive.

Will Upgrading a Prebuilt PC Void Your Warranty?

That depends on the brand and the warranty.

Some manufacturers allow you to upgrade components without a problem, while others may have restrictions.

If your PC is still under warranty, check the manufacturer's terms before you start replacing parts.

What’s the Best Order to Upgrade Your PC?

For a lot of systems, a practical upgrade order is:

1. Storage
2. RAM
3. GPU
4. Power supply
5. CPU
6. Cooling or case

But that order isn't universal.

If your system is overheating, for example, cooling may need to come much earlier.

The right upgrade path depends on what problem you're actually trying to solve.

How Much Does It Cost to Upgrade a Prebuilt PC?

It depends on how far you go.

A simple RAM or storage upgrade might only cost a couple hundred dollars or less.

But once you start replacing several core components, the cost can get close to buying a new PC.

If you're looking at replacing the CPU, motherboard, power supply, case, and GPU, you should start asking whether upgrading the old system still makes sense.

When Should You Upgrade vs. Buy a New PC?

If your current system has a solid foundation, upgrading can make sense.

If you already have a good motherboard, a usable power supply, and enough space in the case, replacing one or two components can extend the life of the system.

But if you need to replace the CPU, motherboard, power supply, and case all at once, you're probably better off starting fresh.

Prebuilt PCs aren't locked down, but they do have limits.

The key is learning where those limits are before you start spending.

 

Written by Will Wilson
Updated: 9/21/2026