BIOS and CMOS question about PC not POSTing

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Question: will updating BIOS and resetting CMOS by changing the battery wipe my overclockers installed overclock completely?

I bought a ‘Titan Envy Duo DC’ system in August 2014, which has ran faultlessly since the day I got it.

Specs are: i7 4790K @ 4.6GHZ
Asus Sabretooth Z97 Mark2
Samsung 840 Evo 1TB SSD
2 TB storage drive
16GB DDR3 2400Mhz RAM
750W Super Flower PSU ( they updated the systems to 1000W after I bought mine as they were sold as SLI machines ).

I installed Win 7 on mine, then upgraded ( not clean installed ) Win 10 before the free trial ended.
I have also upgraded the GTX 770 4GB to a 1070 6Gb card recently, after the issues started
The issue is that the last couple of months - way after win 10 upgrade and before I upgraded the GPU – the system has become very erratic POSTing. Sometimes it starts fine ( power on, POST & boot ), usually it powers on, doesn’t post. No BIOS, just a black screen. I know there is a signal being received as the screen stays lit. I usually soft reset it from the tower 4 or 5 times, then power off and hard reset until it POSTs. It started out as a few times, it’s now at the point where I seem to taking 5 to 10 minutes to get it working.

So far, I’ve re-seated all bits apart from CPU cooler as it’s a waterblock and I’m a big wuss.

Before I start replacing PSU/SSD, I haven’t ever updated the BIOS ( I’m following the general hardware troubleshooting guide sticky ). So my question is, if I update the BIOS and/or replace the CMOS battery, will it erase the overclock installed at build totally?

Cheers for any help,

Ste
 
YES I think so
unless you can save the oc profile then reinstall
Don`t know if it would work though as the overclockers oc will be for that mobo bios it is currently installed on
 
On my Asus Maximus Z97 Ranger the saved OC profiles do get wiped on bios update. You can usually save the OC profiles to a USB, IIRC Asus does not recommend using an OC profile from x version of bios with y though. Why not take screenshots of the bios setting pages? F12 on mine saves screenshots to USB.
 
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