Ok, as long as you unplug the AC power cable going from the wall to the PSU and powering on (=drain the PSU capacitors), then 1 minute without the CR2032 battery is more than enough to ensure a cleared CMOS. Could of course be that what you are seeing on your EV3 rev 1.5 motherboard, is the same reason that BIOS didn’t boot on my X99D4M4.
Socketed BIOS: Basically you can search for “DIP8 to SOP8”. That gives you a device which typically some audiophiles use on sound cards, to easily swap out different OP-amps. But it also works perfectly for a normal BIOS chip. Then de-solder existing chip, finally solder the device on.
General answer: Out of the software that you mention, then I have found NeoProgrammer to be the best in all regards. I am using version 2.2.0.10, never had a problem. With regards to the specific problem you are seeing with the CH341A software, then this sounds like you have not selected the right chip, therefore you do not have the right buffer size.
OK thank you for your support I have done flashing my BIOS back to my default BIOS V1.5 and successful with NeoProgrammer and I use test clip because its hard to use SOP8 (like a pinch tool) always s failed and quickly worn out.
Btw I was so confuse at first because NeoProgrammer, Asprogrammer, & CH341A programer, can not detect my BIOS chip… So I browse in YT and found Miyconst tutorial for flashing…he said some of the Chinese motherboards need to power on the PSU (but DO NOT TURN ON PC/system) in order to power up the BIOS chip so CH341A & programmer can read it…I did that and at last it can read my chip thank God I was so hopeless at that time. Miyconst also said some Chinese motherboards also need to uninstall processor just to get read by CH341A .
What I done is I disconnect everything on motherboard and only plug 24pin motherboard + 8pin CPU from PSU …also I did not remove CMOS battery. Then I connect all 8 test clips to the chip carefully then connect to CH341A … After that I TURN ON the PSU …the RED light on CH341A will turn on. Then I connect CH341A to laptop and open NeoProgrammer to execute flashing the BIOS. Done.
Congratulations, that is a tough introduction to restoring a motherboard! It is a great feeling to bring it back to life. Yes, different boards required different things for the in-circuit BIOS flashing to work. I think you better understand why I went with making it socketed now, avoids all the hassle!
Now back to your initial plan of overclocking the CPU: Since you now have everything that is needed to restore the system, then you can try my modified X99D4M4 revision 005 BIOS.
Can you also upload your original EV3 rev 1.5 BIOS, I want to check some things?
Yes now I know the process to flash BIOS is not easy after all later if I have much time to spend I will try make a socketted BIOS. For overclocking again with your modded BIOS I have to postpone for a while because I need to do something with my PC
I have done flashing my BIOS back to my default BIOS V1.5 and successful with NeoProgrammer and I use test clip because its hard to use SOP8 (like a pinch tool) always s failed and quickly worn out.
I was so hopeless at that time. Miyconst also said some Chinese motherboards also need to uninstall processor just to get read by CH341A .
later if I have much time to spend I will try make a socketted BIOS. For overclocking again with your modded BIOS I have to postpone for a while because I need to do something with my PC