However, broadly characterizing a CMOS clear as unnecessary is overly emotional.Įmsir - as has already been said we are all on the same page here, and without risking dragging the thread off topic (again), back in the very olden days (like PentiumI!!! days or something), BIOS programming was one of my things - and back then, a manual reset was often a valuable bit of insurance as some flashers wouldn't automatically (or always properly) clear the CMOS. I never clear mine before or after and have updated multiple boards for many years with and without overclocks applied at the time of update - never an issue. I agree with the idea clearing the cmos should have nothing to do with a UEFI update applying properly. Usually the CMOS clear recommendation is made when someone has had problems before or after the update. Instability can have an effect on an update if performed in Windows or via EZ Flash. Because of that, I do have to offer some defense to those that recommend a CMOS clear at certain times: The CMOS clear recommendation is made to take instability out of the equation since it removes an overclock, restores SPD/JEDEC timings, and resets all signalling. I do however see it as a reasonable troubleshooting step when someone is experiencing problems before or after an update. I do not recommend clearing before or after as a routine process. It's good that we can discuss matters like this in a rational manner rather than just following nonsensical rituals. I stopped doing that during the Sandy Bridge era. But nowhere does it mention the need for CMOS resets when flashing as you correctly stated. Example, the M8G manual still states for EZ Flash that one should load optimized defaults after the flash. Some of the confusion is based on outdated or incorrect information still in manuals. Entering the BIOS with CPU or memory OCed probably isn't a good idea when one is about to flash. We're on the same page except I load optimized defaults, save and reboot before flashing to ensure that stock settings are in place. The new BIOS is loaded with optimized defaults. When you flash/update BIOS it will automatically erase the old BIOS. There are so many people out there thinking they have invented something new by telling you have to clear CMOS and load optimized defaults before/after updating /fash the BIOS. I've been updating BIOS over 500 times in the last 5-7 years on different computers, and never cleared CMOS or loaded optimized defaults before/after updating. As you said BIOS will atomatically reset to optimized defaults after flashing/updating BIOS. But it has no effect at all on flashing or updating BIOS. Some people just think it will help them doing things right. There is NO documentation what so ever that says you have to clear CMOS before (or after) flashing BIOS or updating. Clear CMOS is made for correcting errors when Overclocking and wrong settings in BIOS. You don't need to clear CMOS when flashing BIOS. So what is it.Does one really have to clear CMOS and load optimized defaults after flashing anymore? Also, if one presses F5 to load optimized defaults then F10 to save, immediately after pressing F1, one gets the message "No changes were made". Regarding resetting CMOS **after** flash.All indications are that this is being done automatically based on the "Press F1 to enter setup" prompt after flashing.
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