Guys, anyone noticed that?

I can pass LinX 20 passes with 1.25v, but I fail prime with 1.25v, 1.26v pass prime, but 1.26v fail occt, 1.28v pass all

1.25v = LinX pass, prime95 fail , occt medium test fail
1.26v = LinX pass, prime95 pass, occt medium test fail
1.28v = LinX pass, prime 95 pass, occt pass