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Saving defective chips with improvised cooling?

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Reply 20 of 24, by myne

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The playstation guy specifically states in one of his videos that the penny trick is stupid.
Extra pressure doesn't help and most likely hurts.

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Reply 21 of 24, by Vany

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myne wrote on Yesterday, 05:37:

The playstation guy specifically states in one of his videos that the penny trick is stupid.
Extra pressure doesn't help and most likely hurts.

The heatsink was not making full contact with the chip itself, Only 3/4 of the chip was covered, in this case, it helped. I haven't used a penny but an aluminum washer since it was glued to an aluminum part anyway.

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Reply 22 of 24, by Vany

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Archer57 wrote on Yesterday, 05:32:
Did you use glue which can handle up to 100C? It may fall off otherwise... Also should be really careful with this - pretty easy […]
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Vany wrote on Yesterday, 05:17:

I went with "Solution C" and modified the heatsink by gluing a single 1mm washer on top of it so that the keyboard keeps it squeezed down.

Did you use glue which can handle up to 100C? It may fall off otherwise...
Also should be really careful with this - pretty easy to break the die if you apply uneven pressure. I'd be pretty hesitant to keep it "squeezed" by keyboard just in case i type on it with a bit too much force...

Vany wrote on Yesterday, 05:17:

Now that I've confirmed though that the Radeon chip in the T500 is good, I'll do some stress testing.

Be careful with this. I am not sure it is a good idea to torture old chip with stress tests. If it's working i'd just use it normally and hope it lasts, no reason to basically do accelerated aging/wear on purpose...

I don't believe the Mobile 3650 can reach such temperatures, it is a mid range chip, but if the glue fails, the keyboard will hold it down. Initially I tried with two washers but there was an obvious bump when I started tightening the screws, so I removed one and just kept the one. There is no curve on the keyboard now, don't worry the chip still works 😀

Regarding the stress testing, there won't be any overclock, I plan to only use the laptop as it normally would be used so I'll test video encoding, 3dmark, some actual era-specific games for that chip and such and that is it really. Either way it is a mid-range chip from 2008... if it can at least show me how it behaves after I've done the bare minimum to ensure that it has factory-cooling, stock airflow and clean heatsinks. Goal is to have it under 70C when it plays a heavy game like Crysis. If it doesn't, I'll see what I can do to modify the cooling further.

TLDR: I want to give it the best possible chance at surviving normal workload under "normal" conditions.

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Reply 23 of 24, by Archer57

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Vany wrote on Yesterday, 05:51:

I don't believe the Mobile 3650 can reach such temperatures, it is a mid range chip, but if the glue fails, the keyboard will hold it down. Initially I tried with two washers but there was an obvious bump when I started tightening the screws, so I removed one and just kept the one. There is no curve on the keyboard now, don't worry the chip still works 😀

It can, and probably does, most laptops i've seen bump against 100C or so limit...

Just be careful - it may fall off over time and short something... may be worth getting something automotive just to be safe. I've used gasket sealant for stuff like this before 😀

Vany wrote on Yesterday, 05:51:

Regarding the stress testing, there won't be any overclock, I plan to only use the laptop as it normally would be used so I'll test video encoding, 3dmark, some actual era-specific games for that chip and such and that is it really. Either way it is a mid-range chip from 2008... if it can at least show me how it behaves after I've done the bare minimum to ensure that it has factory-cooling, stock airflow and clean heatsinks. Goal is to have it under 70C when it plays a heavy game like Crysis. If it doesn't, I'll see what I can do to modify the cooling further.

TLDR: I want to give it the best possible chance at surviving normal workload under "normal" conditions.

Yeah, that's fine. Some people like to run 3dmark on a loop overnight, or worse - furmark. I personally consider that... questionable idea. Especially furmark - it creates much more load than any real task would and can outright kill chips which do not have power limit yet.

Reply 24 of 24, by Vany

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Archer57 wrote on Yesterday, 06:12:
It can, and probably does, most laptops i've seen bump against 100C or so limit... […]
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Vany wrote on Yesterday, 05:51:

I don't believe the Mobile 3650 can reach such temperatures, it is a mid range chip, but if the glue fails, the keyboard will hold it down. Initially I tried with two washers but there was an obvious bump when I started tightening the screws, so I removed one and just kept the one. There is no curve on the keyboard now, don't worry the chip still works 😀

It can, and probably does, most laptops i've seen bump against 100C or so limit...

Just be careful - it may fall off over time and short something... may be worth getting something automotive just to be safe. I've used gasket sealant for stuff like this before 😀

Vany wrote on Yesterday, 05:51:

Regarding the stress testing, there won't be any overclock, I plan to only use the laptop as it normally would be used so I'll test video encoding, 3dmark, some actual era-specific games for that chip and such and that is it really. Either way it is a mid-range chip from 2008... if it can at least show me how it behaves after I've done the bare minimum to ensure that it has factory-cooling, stock airflow and clean heatsinks. Goal is to have it under 70C when it plays a heavy game like Crysis. If it doesn't, I'll see what I can do to modify the cooling further.

TLDR: I want to give it the best possible chance at surviving normal workload under "normal" conditions.

Yeah, that's fine. Some people like to run 3dmark on a loop overnight, or worse - furmark. I personally consider that... questionable idea. Especially furmark - it creates much more load than any real task would and can outright kill chips which do not have power limit yet.

The moment the temps become unsatisfactory I'll stop the testing - in this case, gpu above 70C. After that I'll go and mess with the heatsink again, see if I can Frankenstein something to keep the temps low. Sadly the CPU is also one of the hot ones and isn't helping the situation. Original goal was Max 60C but I don't think that is possible without an additional fan... I'll post my results here when I'm done though!

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