I'd actually be fine with 1.9v on a Palomino core, if I had good enough cooling. The higher the voltage, the higher the risk to your CPU. A small voltage bump probably won't cause too many problems and will shorten the life of your CPU only by a small amount. The larger the voltage bump, the riskier it is. Better coolings helps fight this. Before you start going insane with the voltage, be sure you know exactly what you're doing. I am not what you would call a risk taker. I've never taken a Palomino over 1.85 volts. At 1.85voltts I kept my on-die temp at or under 39C. I suppose I was a little more gung-ho with my thoroughbred B, It's default voltage was 1.6, I've had it at 1.75 and at 52C. But, it was stable. In my laptop, according to ACPI my CPU temperature has hit 89C. But it was at 1.5GHz (default) and 1.45volts (also default). It was also a mobile CPU.