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Originally Posted by unregistered
measured temps are NOT the measure, chase the (CPU to CPU variable) overclock, better resolution
yes, FAR more work but more significant results
(glad its Cathar's time and not mine)
? how can you 'SMOOTH' a hot spot whose location is not known ?
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Will have 3 separate CPU's to play with. Yes - a lot of time.
Regarding "smoothing", apart from location - also the size?
Really what I'm attempting here is a prediction of the lateral heat-spread though the bp given the assumption that the cooling is not going to be equal across the base of a cup/wall "cell". So assuming an infinitessimal point - it's a case of figuring out what amount of material needs to be between the CPU and the convection area to ensure that effectively an entire cooling "cell" is engaged for a point source of heat, but also not putting so much material in the way that conduction becomes a major cost.
On the original Cascade I could only say that really about 1/3rd of any particular cooling cell was acting on any given point of heat. In fact the size of the cooling cells made it somewhat hard to set the bp thickness at an acceptable level without the cost of copper conduction becoming a major concern.
In essense the 25% shrink (in each dimension) of the XXX was absolutely necessary to provide a better tradeoff between lateral heat spread and conduction. Ideally I'd like the XXX to undergo a further 20% shrink to get it all "perfect", but that's a battle for another day.
Overall in the XXX the net conductive thermal resistance hasn't dramatically changed from the regular Cascade, just better balanced, or "smoother", as I put it. Am hoping for tweaks to the jet geometry/velocity to buy some overall performance gain, but again, not exactly holding out really high hopes.
Of course the savvy of you will have worked out by now that the XXX has a thicker base-plate than the Cascade, and that does directly translate into better low-flow performance. Incidentally the SS has a 40% thicker bp than the regular Cascade. The only real doubt in my mind is how the thicker bp affects higher-flow performance. Will the copper conduction cost become the dominant factor within the limits of the flow rates that I'm capable of enacting on the block? This is the question that I have really yet to wholly figure out.