Fixing the IOMMU VALORANT error & how it impacts security and performance

The IOMMU VALORANT error has been popping up for many players lately, and it’s more than just a random annoyance. It’s Riot’s way of stepping up the game against cheaters by requiring certain hardware security features. If you’re wondering what IOMMU is, why VALORANT suddenly cares about it, and how to fix this error so you can jump back into matches, you’re in the right place. Let’s unpack what’s going on behind the scenes and get your system ready to play fair and square.

What is the IOMMU VALORANT error?

If you're encountering a VALORANT error like VAN9005 or a message stating that the game requires IOMMU and HVCI enabled, this indicates that Riot’s Vanguard anti-cheat system is enforcing new hardware-based security measures. This error often appears after a Windows update, BIOS reset, or hardware changes. Simply put, VALORANT now requires IOMMU, Secure Boot, TPM 2.0, and Memory Integrity (HVCI) to be enabled to prevent sophisticated cheating methods.

What is IOMMU in VALORANT?

IOMMU stands for Input–Output Memory Management Unit. It is a hardware feature that restricts devices from directly accessing system memory. In the context of VALORANT, IOMMU helps block cheats that rely on direct memory access (DMA) techniques, which can bypass software-level protections. Riot’s Vanguard anti-cheat kernel driver uses IOMMU to ensure that unauthorized devices cannot manipulate memory, thereby enhancing overall security.

How to enable IOMMU for VALORANT: Step-by-step guide

Follow these steps to resolve the IOMMU VALORANT error and comply with Vanguard’s requirements:

1. Access BIOS/UEFI Settings

• Restart your computer.
• During startup, press DEL, F2, or ESC (depending on your motherboard) to enter BIOS.

2. Enable IOMMU or VT-d

• Intel users: Find and enable VT-d or Intel Virtualization for Directed I/O.

• AMD users: Enable IOMMU, SVM, or AMD-Vi within the advanced or chipset settings.

3. Enable TPM 2.0 and Secure Boot

• Enable TPM or fTPM in the security or trusted computing section.
• Enable Secure Boot under boot options. Here is a detailed explanation about how to enable Secure Boot for VALORANT.

4. Enable Memory Integrity in Windows

• Go to Windows Security > Device Security > Core Isolation.
• Turn on Memory Integrity.

5. Save Settings and Restart

• Save your BIOS changes and reboot.
• Launch VALORANT; the error should now be resolved. If you do not see these options, updating your BIOS firmware is recommended.

Why IOMMU is important for VALORANT security

VALORANT’s Vanguard anti-cheat requires IOMMU to:

• Prevent DMA-based hardware cheats that bypass software defenses.
• Block unauthorized access to system memory at the hardware level.
• Detect and log faults caused by unauthorized memory access attempts, improving system stability.

Requiring IOMMU significantly enhances protection against advanced kernel-level cheats, ensuring a fairer competitive environment.

Does IOMMU affect VALORANT performance?

Most users will experience no noticeable performance loss when enabling IOMMU.

• The overhead introduced by IOMMU is minimal and generally imperceptible during gameplay.
• Some specialized setups, such as virtual machines or GPU passthrough configurations, might experience slight input latency.
• For standard gaming PCs, enabling IOMMU offers substantial security benefits without sacrificing performance.

Enable IOMMU to play Valorant securely

If you encounter the IOMMU VALORANT error, enabling IOMMU in BIOS alongside Secure Boot, TPM 2.0, and Memory Integrity is essential. This will resolve the error and help protect Valorant against advanced cheating techniques, creating a safer competitive experience.