Arctic Silver

[lynx]

from AS's site:

Caution:
While much safer than silver greases engineered for high electrical conductivity, Arctic Silver thermal compound should be kept away from electrical traces, pins, and leads. The compound is slightly capacitive and could cause problems if it bridged two close-proximity electrical paths.

also from AS website:

On systems measuring actual internal core temperatures via the CPU's internal diode, the measured temperature will often drop 2C to 5C over this "break-in" period.

I might have seen around a 2 or 3 degree drop, can't remember
but definately not 10

I have to agree w/ clocker on this one
the 200 hour break in period, the price of the compound...
it just never justified itself

Odd, I could have sworn it used to say it wasn't conductive, on that site

It isn't conductive, but it is capacitive. That means it won't allow a current to pass but it will transmit a signal, which is almost as bad with high frequency cpu circuits.

[Snee]

So I was right, and I was wrong.

Science FTW.