The Alienware 15 R3 is a strong gaming laptop, for those who want great performance and smooth gameplay. But as technology changes, many users ask: Can you upgrade the CPU in the Alienware 15 R3? The answer is not simple, but we’ll explain if it’s possible and how to do it.
This guide covers:
- Whether you can change the CPU in Alienware 15 R3
- How to upgrade your CPU step by step
- Problems and limits you may face
- How to check if a new CPU will work
- The good and bad sides of upgrading
By the end, you’ll know if upgrading your CPU is a good idea or if other options can boost your laptop’s speed.
Can You Change the CPU in Alienware 15 R3?
Yes! You can change the CPU in an Alienware 15 R3. But before you start, it’s important to know the steps, costs, and possible issues. Like most gaming laptops, the Alienware 15 R3 allows some upgrades. But there are a few things to check first.
Why Upgrade the CPU?
Before we talk about how, let’s look at why you might want to do it. Here are the main reasons:
- Faster Performance – Newer games and apps need more power. A better CPU can speed things up.
- Better Multitasking – A faster CPU helps you do many things at once, like gaming and streaming.
- Longer Lifespan – A new CPU can help your laptop stay useful for more years.
What Are the Challenges?
Upgrading a laptop CPU isn’t always easy. Here’s why:
- It’s Tricky – You need to take apart the laptop, which can be hard.
- Warranty Issues – Changing parts may void your warranty. Check before you start.
- Limited Choices – Only certain CPUs work with this laptop. You can’t install just any processor.
How to Upgrade Alienware 15 R3 Processor

Upgrading the CPU in your Alienware 15 R3 is a multi-step process. Here’s a step-by-step guide on how to perform the upgrade:
Step 1: Verify CPU Compatibility
Not all processors are compatible with your Alienware 15 R3. The laptop uses an Intel Skylake or Kaby Lake processor (6th and 7th generation), meaning your options are limited to those specific families. Before purchasing a new CPU, make sure it’s compatible with your laptop’s motherboard and chipset.
Key Factors to Consider:
- Socket Type: The Alienware 15 R3 uses an LGA 1151 socket, so the new CPU must match this socket type.
- Thermal Design Power (TDP): Higher-end CPUs generate more heat, so it’s crucial to ensure that your cooling system can handle the extra load.
- Clock Speed: While you want more power, you also need to make sure the new CPU offers better performance without sacrificing system stability.
Step 2: Gather Necessary Tools
Before you begin disassembling your Alienware 15 R3, make sure you have the right tools. These typically include:
- Small screwdriver set (particularly precision screwdrivers)
- Thermal paste for reapplication (if removing the heatsink)
- Anti-static wrist strap to prevent damage to components
- A clean surface for disassembling the laptop
Step 3: Disassemble the Laptop
Carefully remove the back panel of the laptop using a screwdriver. Once open, you’ll have access to the motherboard, RAM, and CPU. You’ll need to remove the battery and any components obstructing the CPU, including the RAM and cooling fan.
Important Notes:
- Take your time and remember the order of removal for all components. This step is critical for reassembly later.
- Label screws so you don’t lose track of where they go.
Step 4: Remove the Existing CPU
Once you have full access to the CPU, it’s time to remove the old processor. Carefully unscrew the CPU socket and remove the heatsink. The CPU will be attached to the socket using a thermal adhesive or thermal paste. Gently lift the CPU out and set it aside.
Step 5: Install the New CPU
Align the new CPU with the socket and insert it carefully. Make sure that it fits snugly into place. Apply a small amount of thermal paste to the top of the CPU before reattaching the heatsink.
Step 6: Reassemble and Test
Once everything is securely in place, reassemble the laptop by following the reverse order of the disassembly process. Power on the system and check the BIOS to ensure that the new CPU is recognized and functioning correctly.
Alienware 15 R3 CPU Compatibility
As mentioned earlier, the Alienware 15 R3 is compatible with Intel Core i7 (6th and 7th generation) processors. Some popular models that are commonly used for upgrades include:
- Intel Core i7-6700HQ – A quad-core processor with a base clock speed of 2.6 GHz, often used in the original Alienware 15 R3 setup.
- Intel Core i7-7820HK – A higher-end processor that offers unlocked performance, which is a good choice for users looking for more power.
Note: The CPU must be compatible with the motherboard’s chipset and the cooling system’s capabilities. Upgrading beyond certain limits could lead to overheating or instability issues.
Risks of Changing CPU in Alienware 15 R3
While upgrading your CPU can bring performance benefits, there are some risks associated with the process:
- Heat Issues – A more powerful CPU may generate more heat, which can lead to thermal throttling or overheating if your cooling system isn’t sufficient.
- Warranty Void – Opening your laptop and replacing the CPU may void your warranty. Always check your warranty agreement before proceeding with upgrades.
- Complex Process – If you’re not familiar with laptop disassembly and reassembly, there’s a risk of damaging other components during the process.
Alternative Solutions to Upgrade Alienware 15 R3 Performance

If changing the CPU seems like too much of a hassle or doesn’t provide the performance boost you’re hoping for, there are other ways to improve the performance of your Alienware 15 R3:
- Upgrade RAM – Adding more memory can improve multitasking capabilities and overall system performance.
- Upgrade Storage – Switching from a traditional hard drive to a solid-state drive (SSD) can significantly speed up boot times and application loading.
- Cooling Pad – Using an external cooling pad can help keep your laptop cool and prevent thermal throttling.
Conclusion: Should You Change CPU in Alienware 15 R3?
Changing the CPU in an Alienware 15 R3 is possible but comes with its own set of challenges. It’s important to ensure compatibility, prepare for the complex disassembly process, and be aware of the risks involved. If you’re not confident in your ability to perform the upgrade, you might want to consider professional help.
Question for the Reader: Have you ever considered upgrading your Alienware laptop? What other upgrades would you consider to improve its performance? If you found this article helpful, don’t forget to check out our related guide on upgrading RAM in Alienware 15 R3 and more tips for getting the best performance out of your gaming laptop!

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