Heatsink design 101

Details about 5 X STARS-700 SILVER Thermal Grease CPU GPU PS3 HeatSink Compound Paste Syringe


Is this 10% silver (by weight) heatsink mounting compound better than regular zinc oxide silicone paste? Yes. And not by just "a little".


The copy to clipboard feature on RV Net is not working as of this post, so no pictures and no direct link.

http://www.ebay.com/itm/131128411458?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

1. Rotten use of available space

2. Even 20 cfm air flow improves heat transfer about 300%.

3. Aluminum extrusions are costly as hell.

4. Lifespan of LED goes bonkers as temperature rises. Logarithmic.

5. Too many theorists compromise heatsink design by running devices too warm.

But there's not darn thing wrong with the above mentioned videos. Keep at LED junction temp cool and expect a device lifespan of 40,000+ hours.

There are red 20ma 2.7 v devices that have been running continuously on the Kelley II, for 33 years. They are "Power Available To Bilge Pumps" indicators. 290,000 hours.

An IR thermometer played from 6" right on the lit LED panel will render a really good approximation of interior junction temperature. The RISE in amperage between an ambient temperature first-lit LED and another reading taken when the heat sink is fully saturated will reveal an astonishingly accurate decision as to whether the heatsink needs help.