When using an older computer, it’s natural to wonder if you can upgrade your operating system to Windows 11.
If your system runs on an older CPU like the Intel Core i5-4670—which can still handle web browsing, document editing, and video streaming—you might hesitate to buy an entirely new PC.
While the i5-4670 is considered quite old by today’s standards, it is still capable of handling basic daily tasks. However, the real issue is that Microsoft does not determine Windows 11 compatibility based solely on whether a system feels “fast enough.”
What Kind of CPU Is the i5-4670?
The Intel Core i5-4670 is a desktop processor from Intel’s 4th Generation Core family (Haswell architecture).
When it first launched, it was a popular choice not only for everyday office computers but also for mainstream gaming builds. Equipped with four cores, it offered solid, dependable performance for its era.
Because of this, having an i5-4670 in your system doesn’t mean your PC is completely useless today. For basic workloads—such as browsing the web, editing documents, or watching movies—it remains functional. However, official Windows 11 support is a completely different story.
Windows 11 Requires More Than Just Raw CPU Performance
When judging OS compatibility, most people look at CPU performance first. However, Windows 11 requires specific hardware and firmware security features alongside CPU generation support—most notably TPM 2.0 and Secure Boot.
TPM (Trusted Platform Module): A hardware- or firmware-based security technology designed to safeguard cryptographic keys and system integrity.
Secure Boot: A security standard that ensures a device boots using only software trusted by the original equipment manufacturer (OEM).
Therefore, simply asking, “Is my computer fast enough to run Windows 11?” isn’t sufficient. You must evaluate both the CPU generation and hardware security capabilities.
The Core Problem: CPU Generation Limitations
The biggest obstacle for the i5-4670 is its architecture. It is a 4th Gen Intel processor, whereas Microsoft’s official Windows 11 CPU compatibility list generally requires an 8th Gen Intel processor or newer.
This means that simply enabling TPM settings in your BIOS will not magically turn an i5-4670 build into an officially supported Windows 11 PC.
Here, it is vital to distinguish between official support and unsupported bypass installations:
Unsupported Installations: There are workaround methods available online to bypass Windows 11 hardware checks and install the OS on unsupported hardware.
Official Support: Just because you can install it through bypasses does not mean Microsoft officially supports your configuration. You may face stability issues, lack of security updates, or unexpected software bugs.
What About an Upgrade to an 8th Gen CPU like the i5-8400?
Many users consider upgrading to an 8th Gen processor, such as the Intel Core i5-8400, as a budget-friendly step up. The i5-8400 represents a massive generation gap compared to the i5-4670. However, if your goal is to build a reliable Windows 11 environment, you cannot evaluate the upgrade based solely on the CPU chip itself. You must consider the entire platform: CPU, motherboard, RAM, TPM 2.0, and UEFI support.
Moving from an i5-4670 (LGA 1150 socket) to an i5-8400 (LGA 1151v2 socket) isn’t a simple CPU swap. Because the socket and chipset architecture are completely different, you will also need to replace the motherboard and upgrade from DDR3 to DDR4 RAM. When upgrading an old PC, never calculate your budget based only on the price of a used CPU.
Should You Keep Using Your Old PC?
If your current i5-4670 PC still functions properly, you have three main paths forward:
Keep using your current PC as-is (running Windows 10 or Linux for general tasks).
Attempt an unsupported Windows 11 bypass installation (accepting potential update/stability risks).
Upgrade or build a new platform that natively and officially supports Windows 11.
The best choice depends on your budget and primary use case. If you only need a secondary PC for light web browsing and office documents, keeping the existing setup is cost-effective. However, if you are looking for a reliable primary computer for the long haul, investing money into an obsolete 4th Gen platform makes little sense—moving to a newer, officially supported platform is far more logical.
Summary: Focus Beyond “Can It Install?”
The most common mistake when assessing Windows 11 compatibility on older hardware is focusing exclusively on whether the installer succeeds.
For a long-term system, you must separate the following three questions:
Can it be installed? (Yes, via bypasses).
Is it officially supported? (No).
Will it remain stable and secure long-term? (Uncertain).
If you currently use an i5-4670, look beyond the immediate installation screen and evaluate how long you intend to rely on this PC for your daily workflow.