I was a little concerned at first right after I installed the Zalman because the temps were almost the same as the Asus cooler!
BUT, I didn't take into account the curing time for the Thermal Paste in my hurry to see some new temp results!!!
With AS-5 that's 200 hrs of off & on cycle usage.
Once it had that time to cure the temps dropped like a rock in water...

I don't know if there is any curing time for Dielectric Grease.
But I have a question> Why Dielectric grease for your thermal paste?
"That is with the Dielectric grease. I'll be using that with it."
From what I've read it's not meant for thermal paste & is not good at transferring heat such as AS5 is.
Then again you didn't specify "Exactly" what Dielectric Grease you were using and if it is actually made for that or not...
"Dielectric greases and insulating fluids are insulating oils, greases, transformer oils and fluids that have a high dielectric strength and are used in transformers, capacitors, EDM machining, and other electrical device applications."
Also, Vista "Dreamscape" uses quite a bit of CPU usage so it will bring the temps up compared to a typical desktop background image which will leave your CPU at idle.
