BIOS diags do not test RAM's Windows functionality. Download Microsoft's Memory diagnostic too and burn to a cd. then test your memory.
To run Windows Memory Diagnostic, you must reboot your computer with the disk or CD-ROM on which you installed Windows Memory Diagnostic in the drive. After the reboot, Windows Memory Diagnostic will load and its interface will appear. After loading, the first test pass will begin, using the default standard test suite, and continue until complete, unless Windows Memory Diagnostic is either paused or exited. Once the first test pass is complete, Windows Memory Diagnostic will begin a second test pass using the same settings as before. Windows Memory Diagnostic will continue to run test passes until you exit.
http://oca.microsoft.com/en/windiag.asp
Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response
Thanks, Joe I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309