Do you mean you’re getting an error message saying the “selected file is not a proper BIOS file”?
Or are you getting a different error? If it’s the above, you’ll need to remove and redownload the updated BIOS, as it was corrupted during download, and you’ll need to make sure you have a stable connection while downloading to avoid it happening again.
If you’re getting a different error I’d need to know the exact wording to help any further.
Since what everyone else has suggested hasn’t worked, there’s 3 more things to test:
Update your BIOS. Depending on the age difference between your CPU and your MOBO, the BIOS might not be configured correctly for your CPU and thus half your RAM is unable to be addressed.
Test your RAM sticks and memory slots individually. Put your sticks in the primary channel (per your MOBO specs) one at a time and reboot to see if they’re actually working. Then try moving them around to see if the issue is a bad slot, rather than a bad stick.
Are you sure you’re not running a 32-bit OS? You’d be capped at 4GB system memory on 32-bit Windows, for example, no matter how much physical RAM you have.
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So it’s time to delete my old IG if I can remember the log in, got it.
I’m inclined to agree that the CPU might have been set incorrectly / have a bad pin, especially after the black screen and BIOS errors after updating.
Unfortunate, but it happens to the best of us.