Processor · high

How to fixAMD-FCLK-INFINITY-ERR

AMD Infinity Fabric Instability (FCLK)

What this error means

AMD-FCLK-INFINITY-ERR is a high-severity processor (CPU) problem. AMD systems crash or become unstable due to out of sync FCLK (Infinity Fabric clock) and MEMCLK. Another common trigger is weak RAM modules with XMP above DDR5-6000. Work through the steps below in order.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Set FCLK = MEMCLK / 2 (for DDR4) or FCLK = MEMCLK / 2 (DDR5)

Set FCLK = MEMCLK / 2 (for DDR4) or FCLK = MEMCLK / 2 (DDR5).

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Increase the SOC voltage to 1.1-1.15V

Increase the SOC voltage to 1.1-1.15V.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Limit RAM to DDR4-3600 or DDR5-6000 for the most stable FCLK 1800/3000

Limit RAM to DDR4-3600 or DDR5-6000 for the most stable FCLK 1800/3000.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • FCLK set higher than 2000 MHz without sufficient SOC power
  • FCLK and MEMCLK mismatch (optimum is 1:1 ratio)
  • Weak RAM modules with XMP above DDR5-6000