Hmmm. Never seen that before. Did they supply the paste?
I would not do it but instead, use a good paste and apply the thinnest even layer you can possibly apply. There is just no way a layer of goop can be more efficient at transferring heat than direct surface to surface contact between the mating surfaces. And if you double the thickness, it is likely that is not going to happen.
At any rate, you need to monitor your temps. Your motherboard utilities disk will have a monitoring program (or check for a more recent version on Gigabyte's website). Or, you can try
CoreTemp for newer Intel and AMD CPUs, or [url="http://<a%20href="http://www.techpowerup.com/realtemp/"%20target="_blank">
http://www.techpower...m/realtemp/</a>"]
RealTemp[/url] for Intels.
SpeedFan is a great and popular alternative,
or you can try
Motherboard Monitor. Unfortunately, I have found that these programs often have problems properly identifying and labeling the sensor they are reading. The temperatures shown are as accurate as the inexpensive, low-tech sensors will allow, but it may say System Fan instead of CPU Fan. Fortunately, the programs do allow you to edit the labels, so I use
Everest to verify the temperatures (as it is able to put sensor to label correctly), then edit the label in the monitoring program. In Everest, look under Computer > Sensor, then wait a couple seconds for the readings to appear. Unfortunately, Everest does not minimize to the system tray to show real-time temperatures, otherwise, you could use Everest instead of the others.