Quote:
Originally posted by winewood
Lets argue this point slightly. I have a pin size block and a lrww. Both will not behave the same on a simulator of a core vs. one with an IHS. The pin style block may not look good at all compared to a lrww on the core sim. Now on the IHS it may be very close. Why??? the lrww was made to a narrowly defined core hotspot. The pin would work much better with a spreader than would the lrww as it can work better with larger area heat sources like.. a TEC. However, we are not talking TEC cooling now, but IHS cooling. Are we cooling die's anymore?? In a way... no. We are cooling IHS's. Why are people afraid to change to the market?
Now you have testers with the core modeled heat die's, and everyone now is using the IHS. Can you really tell them how their block works with an IHS? Or are the testers just using a core because you like the pretty numbers? Take a die sim using a core heater, then place a IHS on it. Isn't that much closer to real world testing now than pretending the IHS doesn't exist?
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There would be nothing wrong with the numbers obtained using the core only simulator. The only problem I have is when these numbers are used to represent real world CPU’s with I.H.S results. Present core-cooling blocks concentrate on cooling a very small area. The area of the core is about 10 mm by 10 mm or so and centered on the CPU C.W are based on these measurements. So what can be said about a spot cooling blocks is that they can cool are very small area but that is it. A pin block is still a spot cooler only the area it cools is much larger (usually the area of the CPU). What this say’s is that if the core was moved to the top of the CPU the current direct die cooling block would seize to perform if not fail completely. Do the same with a pin style block and the block would still have a very close C.W if not the same it did while the core was in the center of the CPU. My point is this; adding a I.H.S is like moving the die- Don’t expect current performers to remain such and ignoring the I.H.S in testing is only skewing results.