I have my Q6600 OC to 3.0 Ghz at 1.29 VCore, i have 2 questions: how do i determine my cpu VID, and why the hell does my Core voltage go down from 1.248 on idle to 1.184 on prime95 full load?? I am using CPU-Z to determine my VCore.
CPU-Z will tell you your VID. Take a look at the info shown on the CPU-Z screen.
Also, what you're seeing in regards to the VCore drop is called VDroop.
If your VCore goes from 1.29 to 1.184 that's more like a 0.106 change, rather than a 0.01 like you asked.
Also, if your multiplier goes from 9x to 6x, then you still have some of the power saving feature implemented in your BIOS. Due to that, as the CPU is cycled down, your BIOS may also be changing your VCore to reduce heat/energy.
This isn't always good when you OverClock as it can cause some instability when you're jumping back to 9x. If it runs fine for you, don't worry. If you have instability problems with your OC, then worry about it.