Will clearing CMOS damage motherboard while PC is on?


I recently built a new PC. I would like to know if clearing the CMOS while its on and running the O.S. would cause any damage to the components? I have been tweaking the BIOS and quite often I have to clear the CMOS. I'm asking because I added a power switch to the jumper so I don't have to get inside the case every time and I'm worried if I bump the switch it could cause damage. The manual says to turn off the PC and switch the jumper for 5 to 10 seconds. So is the reset instant or do I have 4 seconds of "safe" time? If the CMOS doesn't clear instantly and I have a 4 second window, then if I bump the switch I'm safe? I would appreciate any advice. My PC specs will be posted below.

Thank You, Scooter_2478

Motherboard: MSI Z170A Gaming M5
CPU: Intel Core i5 7600K (Heat sink-Cooler Master Hyper 212 EVO)
RAM: 1x G.SKILL Aegis 8GB DDR4 3000 (planning to add more)
GPU (primary Display): XFX Radeon R9 280 3GB Black Double Dissipation Edition (R9-280A-TDBD) "MODIFIED"
GPU (Secondary Display): Intel HD Graphics 630
HDD: Western Digital WD10EZRX 1TB 7200RPM SATA-6 64MB Buffer
PSU: Apevia 680W
5in. front bay all in one Generic Card Reader+2x USB 2.0+2x eSATA+IEEE 1394+Mic+Headphone+2x fan control+temp sensor+LED Display
1x 120mm LED fan (on heat sink) ,3x 120mm Case fans, 1x 80mm led fan (mounted on side panel)
1x 12v led+control unit, 1x 12v 6ft led
Thermaltake Full Tower (unknown case series)
Reply to scooter_2478
6 answers Last reply
More about clearing cmos damage motherboard
  1. Uh...I actually don't know the recommendations, but I can't imagine that changing bios settings while pc is on is good for your system. I'd imagine it can cause quite a bit of havoc. I personally wouldn't do it but again, I do not know for sure. Technically you can clear cmos from bios, but full loaded into windows, I wouldn't do it ever.
    Reply to Sedivy
  2. pull the power cord
    Reply to ss202sl
  3. +1 pull the power cord.
    This has happened my asrock and had issues with overclock.
    It lasted a couple of years, then started to lose functionality on the board and overclock not saving.
    When I moved the cmos jumper the computer powered up and then I was screwed.
    Reply to dextermat
  4. Well, if you don't like your system, go ahead and try :)
    Seriously the warning in motherboard manual is not to be ignored. Worst case scenario would be that it could damage your motherboard. Most likely scenario, if it is turned only for a split second, it will just freeze your machine. But I would not risk my equipment that way.
    Reply to DRagor
  5. 1. Do not attempt to do a bios reset while the system is powered up, that is much more dangerous to the system then hitting the switch on the PSU or just pulling the plug. It's is always best to follow the manufactures instructions.

    2. That PSU is dangerous junk and should be replaced asap. Apevia units are essential generic garbage in a shiny case.
    Reply to bignastyid
  6. Nope, just did it twice. PC is completely fine and boots up properly. I still would recommend doing it though as it didn't clear cmos until the PC was off.
    Reply to ModiFkrz
Ask a new question Answer

Read More

CMOS Motherboards Components