IHS or not?

[BillA]

dishonest participation ?
an honest oversight ?

from another forum, a post bt eva2000:
"G4 Storm works perfectly everytime on my LGA775 rig just AMD64 get's all weird on me i.e. http://www.xtremesystems.org/forums/...hlight=mcw6002 "

must now admit to being totally disgusted with the non-intellectual non-technical 'assessments' of the IHS and its impact on testing and performance

too bad I cannot come to an accomodiation with Cathar,
I will never comment on a heat die again if Cathar will stick to factual data about the 775 Tim1 joint

how about it Stew ?

[pHaestus]

My only comments on the IHS are from my own experience: CPUs pop off with the cooler when they're attached, and this will rip wires off my modded processors. If that's non-intellectual then so be it.

You know there was at least one other Swiftech Storm review on an IHS-equipped CPUs that also showed it perform rather poorly, wasn't there?

[BillA]

boy I can't write for shit, sorry pH

IHS
775
Tim1 variability
period, full stop

re CPU pins; yes, we agree (same issue on P4 TTVs)
so ?
no pins on a 775, and the IHS itself is retained by the socket 'clamp' (impossible to separate CPU from socket w/o releasing clamp)

I have no issue with anyone testing with a bare AMD CPU, does this not represent the enthauast/procooling community's typical manner of use ?
testing as it will be used, excellent stuff

my issue is not testing as no one has done that of which I am speaking, it is with the ongoing bias in the discussion of testing with an IHS (thread title)
I have suggested consideration of a single Tim1 configuration; while a pissing contest then occured over a different Tim1 configuration (which had been excluded from the onset)

[pHaestus]

My personal problem with the discussion is my inability to properly test the AMD TIM1 joint. I would LOVE to take a 939 and groove the IHS and wire it for diode readings and then just test with it. But I am not at all convinced I could use it for long enough to get any useful data before it broke.

Do you have access to someone that'd machine an IHS as per spec Bill? I can do the diode soldering and I actually have a spare 939 mobo here...

[BillA]

jeez, I sure could not recommend grooving an AMD IHS w/o a program yielding something useful
??
what would be the positive result ?

I know the shop that grooved some before, zero assumption of responsibility, weeks to get to, not cheap (think $150 ? ea)
suggest holding off a bit to see if IHS clad CPU test data may be found acceptable by the forums (lol)
do not want to be sending 1 at a time

EDIT
yes, the 939 Tim1 WILL debond - there is no question in my mind
I would guess that you will observe the number of sink removals 'possible' before Tim1 decouples

[pHaestus]

Well I was thinking that would kind of be the point. Collect CPU case and CPU die temps while cycling system and then while remounting regularly and just watch the joint degrade. Or do we all concede it happens and don't care about the magnitude of the effect?

[BillA]

I have never contested the described degradation of the AMD Tim1 joint, but any test data of that joint cannot be extrapolated to the 775 Tim1 joint as they are different - and very much so

you may not see a gradual decline, also possible is an abrupt shift in temps due to the IHS being (eventually) pulled loose
and after a single test, . . . .

[koslov]

BillA: skip this.

Heh.

Preparing a CPU for testing with IHS: Remove IHS, clean away all TIM joint material. Take clean IHS and fill with thermal paste with thermal properties equivalent to AMD TIM. Fill past normal IHS enclosed volume and take care not to leave any air pockets. Place paste-filled IHS on clean CPU and press firmly. Wipe away excess paste from IHS edges. Seal IHS edges to package with epoxy.

Now you've got a CPU with IHS that should be able to handle any number of remounts. True, the properties will be different, but I don't see why you couldn't get a good match. It's up to the tester to find the right paste, which may not exist. Also, the IHS flex will probably change.

[BillA]

koslov
why not run that 'bare die' poll ?

[koslov]

Poll:
http://forums.procooling.com/vbb/showthread.php?t=12531