Mmmm so3o4nu try to lower the vcore in small steps... if you can run 8 x 500 with the same Vcore setting then at 9 x 450 it would prolly needs a tiny bit less... and try small FFT's for CPU test... my rig is stable with small and Blend... but sometimes caps out at large FFT's... yet it is folding all the time, gamed upon , benched upon and it's rock stable there...

What PLL and FSB Term do you use ?