@GossiTheDog as a hardware expert with over 3 decades of experience, including a great deal of experience with CPU failures: NO.
IT DOES NOT FIX ANYTHING.
If it was unstable, THE CPU HAS PHYSICAL DAMAGE. SEVERE IRREPARABLE DAMAGE. IT CANNOT BE REPAIRED.
YOUR CPU IS A BRICK.
RMA it to Intel. If they argue, remind them they admitted fault publicly.