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Replace heat spreader thermal compound?
Replace heat spreader thermal compound? –
Are there any experts on here that know about replacing the heatsink compound underneath the metal cap IHS's? I've seen youtube videos (with idiots slathering on WAY too much compound, I might add) doing it and forum posts saying to NOT do it at all. Has anyone actually done this, and if so, what did you use, and did it help? Or is it better to leave well enough alone?
after stripping a dozen or so IHS off both gpu and cpu this week i have noticed that some have a good % of available mating sufaces covered and a very small amount of compound being used. indicating a good fit.
others have had air pockets in the compound and others way too little only 24% coverage.
the gpu has thermal epoxy of some kind holding the ihs on the 4 chips on the corners and normal TIM on the core.
the cpu IHS is held on with silicone rubber DO NOT try to pry it off you will just screw the cpu, it needs to be cut or heated. and again normal TIM on the core.
in all the ones i have seen the cpu seems the best of the 2 with very few if any having problems. on the other hand every gpu i did has some kind of problem with the compound.
so stick them back on....
as5 or mx4 on the cores and to hold the IHS on Arctic Alumina Adhesive on the 4 corner chips on the gpu
so in conclusion. if it aint broke dont fix it.
if its been overheating or heatgunned then i would replace it,
Yeah I was thinking of leaving the CPU alone, that seems to not usually be the issue, it's always the GPU/RSX chip. Alumina was exactly what I was thinking for the 4 corners. This unit's been reflowed a couple of times, and the fan runs on high pretty often, even when its just sitting at the XMB doing nothing, so thats why I think it's time for new TIM underneath the heat cap. Do you have any (proper) tutorials or links on the best way to do this? The videos on youtube seem to be done by idiots (at least the ones I was able to find).
if its been reflowed have you checked the height/level of the chips?
ie do a pressure/contact test?
place smal dots of TIM over the gpu/cpy and refit the heatsinks.
do you get a nice even spread of TIM over the heatsinks?
cover the entire surface if the gpu/cpu in very thin coating of TIM and refit heatsinks.
are you getting 100% contact surface between the cpu/gpu and the heatsinks.
if either/both of the above produce good results then look at replacing the TIM under the IHS if you get bad results this may be the cause of the problem.
it may also be worth getting a syringe of cheapo non conductive/non capacitive TIM and inject it under the IHS, basicaly fill the voids under the IHS with TIM and see if the prodblem gets better, if it does then replace the TIM if its the same then it may be the cpu thats gettign hot and making the fans spin.
Links/Tutorials i havent seen any really good ones, 90% of the ones on youtube are ok, you get the idea, just use common sence when doing it. and be really carefull pulling the rsx IHS off.
and remember once you have applied alumina adheasive its going to be a bitch to get back off. maybe worth the tim and cost to do it with as5 or what ever your gonna use for the core first to verify all is good then refit with alumina.
Yeah the spread is good (now), first time I reflowed there were some definite voids on the metal heatsink (not the IHS) over the RSX chip area, so I was thinking either the stuff was drying up really quick (due to heat) or just wasn't making good contact. I got some copper shims from a guy off ebay that I've done business with before for other projects, and now it makes MUCH better contact, but as I said the fan still runs on high, so I'm thinking its time to replace the TIM under the IHS on the RSX chip.
yea i agree is seems you have tried everything else.
only 2 things left now. a bad temp sensor or bad TIM
What is a TIM?
Originally Posted by SccS
You know, that guy from Tool Time? Err.. or it could be Thermal Interface Material (heatsink paste) in this context.
Originally Posted by crashZF5
If you haven't gotten the YLOD, enjoy your PS3. If you haven't gotten the YLOD and decide to open your PS3 just to replace the compound, enjoy your future YLOD. A good compound to use though would be Shin Etsu. Everyone's all AS5 blah blah blah, well to them I say **** your 200 hour break-in period.
Mines been working solidly for over a month after replacing the TIM with AS5. But I pulled mine apart to get all the dust out anyway. Though its true that if it ain't broke, don't break it.
Originally Posted by synce