Thanks really, and yes BIOS monitors -5 and -12V and CPU is +7% voltage set by me because I use it on 300Mhz FSB and it's supposed to work on 266Mhz and if I try only +5% for CPU it's not stable... that's why I really needed sensors to see if Power Supply Unit is coping with the situation +/- 5% (tolerance) -- Regards, Filip Tsachev Technical Department www.infodesign.bg F-Secure Business Partner