Ku-sama

well, first off, my RAM didnt pass Memtest and so i took it out and am sitting on my other gig that i have. it doesnt run stable unless the RAM is at 2T insted of 1T. another is: i have my computer at stock speeds and my processors idle is 43C thats hot as hell for me, my computer never saw these temps before on my SI-97A, but now im on an XP-120 and the temps are higher?? it might just be that the AS5 hasent completly set yet. and another thing, whats the highest safe voltage for my kind of processor? ive ran it at 1.68V stable@3.1GHz, but the temps were 120F, which i dont like