Sorry to barge in, but I keep seeing this mentioned. What exactly is VID?
Voltage ID. Core processors from intel have different VID, each wafer is tested, and a VID is set for that batch. Lower VID means the motherboard defaults will be lower voltage, basically it means the chip is stable with lower than average voltage. But a high VID means the chip may need extra power just to run at stock, and so the motherboard supplies higher volts.
Of course even with a high VID you can still supply extra volts. The "baseline" VID on a Core 2 Duo is 1.3V but even if you have a VID of 1.3 (mine is 1.2V) you can still give 1.4V for example and get a more stable overclock. Low VID is a good sign that you have a good chip, but it's not always a reliable method of predicting overclock.