The 3570k has Intel turbo 2.0 baked into it. It will jump up to this speed when it is necessary to get work done. Nothing to worry about. Voltage varies based on what's required by the processor under a certain workload. The voltages you've listed are well within range of the processor.
Based on your workload, the multiplier will increase or decrease and the voltage usually will as well similarly. The multiplier is just showing you the amount times the processor core clock speed (100MHz) speed your processor is running at to perform the current workload. 3.8GHz is your processor's turbo clock speed, so when you see the multiplier go to x38, it is doing work as quickly as possible (usually under a high workload). The speed will vary based on the demands put on the processor.
To sum it up... Everything looks good with your processor.
COOL! I had asked once before but I felt I didnt give enough detail, but im glad these are solid. now..... off to go order my video card and hard disk drive