for me 1.7 didnt need a voltmod. I can even undervolt it (using rmclock). Its set at 1.308 volts @ full performance when by default its 1.340 volts. I havent tried going lower only because i only installed the processor a couple days ago and have been busy. I wouldn't say it was a sure thing that you would not need to voltmod it but i say the chance of not needing to voltmod is greater than needing to.