Use HWMonitor to measure temps. Speedfan and Coretemp give incorrect temps for the e2xxx series (The real temps are assumed to be 15*C higher - This is dues to the TjMax being Incorrectly read as 85*C rather than 100*C) On stock I couldn't push 1.425v due to excessive heat.
Interesting my vcore states 1.40v and it says max is 1.40v.
Here are the temps:
Intel Pentium E2140 hardware monitor
Temperature sensor 051Â°C (125Â°F) [0x30] (core #0)
Temperature sensor 151Â°C (125Â°F) [0x30] (core #1)