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Enabling IOMMU

  • Updated

What is IOMMU?

IOMMU (Input-Output Memory Management Unit) is a hardware-level security feature that safeguards your system against malicious software and helps maintain the integrity of competitive matches. Akros is introducing IOMMU as a required feature gradually. If your system requires IOMMU and it’s not enabled, the Akros Anti-cheat may display an error when starting.

⚠️ Modifying BIOS/UEFI settings carries risk. If you are unfamiliar with firmware configuration, seek assistance from a professional. Incorrect settings can affect system stability.

1) Identify Your CPU and Motherboard

  1. Press the Windows key, type msinfo32, and press Enter.
  2. In the System Information window, note the following:
    • Processor – identifies whether your CPU is AMD or Intel
    • BaseBoard Manufacturer and BaseBoard Product – identifies your motherboard brand and model

2) Overview of BIOS Settings

Enabling IOMMU requires accessing your BIOS/UEFI and applying the options specific to your CPU and motherboard. Make sure your BIOS is updated to the latest available version.

If you’re unsure, search for:
"How to enable IOMMU on [your motherboard model]" or check the manufacturer’s support site.

3) Activating IOMMU on Popular Motherboards

ASUS Motherboards

  1. Press DEL during system startup to enter BIOS.
  2. Navigate to the Advanced menu.
  3. AMD CPUs:
    • Open AMD CBS
    • Set IOMMU from Auto/Disabled → Enabled
    • If available, enable DMA Protection and DMAr Support
  4. Intel CPUs:
    • Open System Agent (SA) Configuration
    • Enable VT-d
    • Set Control IOMMU Pre-boot behavior to Enable IOMMU during boot or equivalent

MSI Motherboards

  1. Press DEL at startup to enter BIOS.
  2. Go to the OC (Overclocking) section.
  3. AMD CPUs:
    • Advanced CPU Configuration → AMD CBS
    • Set IOMMU from Auto/Disabled → Enabled
    • If present, enable DMA Protection and DMAr Support
  4. Intel CPUs:
    • Navigate to CPU Features
    • Enable VT-d
    • Set Control IOMMU Pre-boot behavior to Enable IOMMU during boot or equivalent

4) Troubleshooting

  • If the IOMMU option is missing: confirm your BIOS is updated and CPU virtualization options are enabled.
  • If problems persist: consult your motherboard manufacturer’s support resources for instructions on enabling IOMMU.

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