Recently, a lot of Windows users encountered the “Fatal Error: rounding” error when they are trying to perform a stress test using Prime95. Mostly, this error is associated with an overclocked CPU. The error usually caused by an inadequate CPU voltage, insufficient power supplied by PSU, outstanding internal component temperature or several other reasons.

Fixes for Prime95“Fatal Error: Rounding”

However, the said error is not a serious one, and we have listed below some reliable solutions that have helped the affected users get rid of this error. If you have experienced a similar situation, then you have come to the right place. Some of the effective fixes we have listed here will help you to solve this issue. Let’s learn more about this.

Fix 1: Clear the CMOS battery:

As per some suffered users, this issue may be due to temporarily saved data being perpetuated by the CMOS battery used by your motherboard. Data previously saved in connection with DOCP is likely to affect your CPU’s behavior under current stressful situations. In this case, it is advisable to open your system case and clear the CMOS battery. For doing so, follow the steps given below.

  • Firstly, turn off your system entirely and unplug the system from the power source.
  • And using a Static Wrist Band, remove the side cover of your computer. (to eliminate the risk of damaging your PC’s internals, you should use a static wrist band).
  • Once you opened the side cover of the PC, locate and identify the CMOS battery. Then remove the battery from the slot using your fingernail or a non-conductive screwdriver.
  • Next, wait for one or two minutes to allow the power capacitors to drain entirely. Then reinstate the CMOS battery and put the side cover back on.
  • Finally, Re-plug your computer into a power source and boot normally before starting another stress test with Prime95.
  • After cleaning the CMOS battery, you would be got rid of the “Fatal Error: Rounding” issue.

 Fix 2: Raise the CPU voltage:

 At times, slightly raising the voltage of the CPU helped few users to resolve the “Fatal Error: rounding” error. As we discussed above, mostly, this error occurs due to insufficient voltage supplied to the CPU. Prime95 indicating that the CPU is not stable enough to do stressful tasks that need extra processing power.

Users can raise the voltage to 10mV until the stress test is completed without the similar error. However, depends on your motherboard, and if you use BIOS or UEFI, the voltage adjusting steps will differ from each case. After raising the voltage, check whether the error gets solved or not. If not, then move to the next fix in the list.

Fix 3: Upgrade the cooling system:

One of the most effective ways to resolve the “Fatal Error: rounding” error is to lower the temperatures of the internals of the system (specifically CPU and RAM). If you notice your PC’s temperature is higher than 90c when your CPU cores are running under full load, you need to lower the temperature. This is a common issue and has several ways to lower your system temperature. You can clean your computer internals, upgrade the CPU coolers, improve your case’s ventilation, and replace the current thermal paste to lower your CPU temperature.

 Fix 4: Upgrade PSU or Lower the overclocked frequencies:

If none of those, as mentioned above, fixes worked for you, we recommend you, upgrade your PSU or try to find some middle ground and lower the overclocked frequencies to eliminate the said error. In some instances, the “Fatal Error: rounding” error may be associated with your PSU; your PSU may not have the capacity to handle the overclocked frequencies you are trying to stabilize.

These fixes are being tried and tested for the “Fatal Error: rounding” error. We strongly believe that any of the fixes listed above will help in your case. As well as this error is reported in all versions of Windows.

Moreover, the said error can also be a result of corrupted or missing files. In this scenario, we strongly recommend using a reliable third-party online automatic repair tool that scans the system for the corrupted, missing system files and automatically repairs them. We hope all the information mentioned in this article will help you to resolve the issue. If you have any queries or feedback, please write down the comment in the below comment box.