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Unread 11-22-2005, 04:22 PM   #237
BillA
CoolingWorks Tech Guy
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no
it is improper to characterize all CPU/IHS TIM joints as being intrinsically variable to a huge extent
that some may degrade so over time and use has nothing to do with testing (don't use old shit)
that some may be inconsistantally mfgd is another separate issue (don't buy cheap shit)

Cathar, take your entire post above and read it in the light of a consistant TTV CPU/IHS TIM joint being a fact
there is nothing to your post, it is ALL totally predicated on variable TIM joint performance
remove that variability and all that's required is learning what the new numbers signify

I have cross-tested multiple TTVs, and tested them over time; they are fine tools
-> what is perhaps not known/being applied is an appropriate correction factor
nothing wrong with a TTV

the real difficulty is that TTVs are not available

anything positive ?
there DO seem to be (today) CPUs not having IHS issues
"Keep it simple."
we agree, test the actual configuration where possible; and since there ARE CPUs w/o an IHS problem . . . .
but this still leaves the quantification of heat unresolved if using a CPU source

". . . which means machining a heat die that looks just like an IHS capped CPU, but is a solid one-metal-no-join piece design."
and this will replicate the heat flux through the TIM joint, and the subsequent lateral spreading through the IHS ?
Roscal says so, I have no good basis to object
where is the DIE TEMP to be measured, and how ? (I missed this in your post)
Roscal did make a suggestion, but
- how do you establish the correspondence of this measured slug temp with a CPU temp ? where the temp is taken and its value are irrelevant, the correlation is key
there are some assumptions here, as did I with my old heat die; I defined it so
how many today would accept that ?

junk the hat, work on valid CPU specific correction factors for a simple post
NB if you want to assess dual core cooling you will need a dual core source (or do junk testing)

-> how is the die face to be maintained ?

do you know what the TTV has that no die will ever have ?
repeatability, lesser absolute performance but a greatly reduced range
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