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!VERY strange cooling for graphics card (memory only partially covered): problem?

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post #1 of 16 (permalink) Old 03-06-2019, 03:58 PM - Thread Starter
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!VERY strange cooling for graphics card (memory only partially covered): problem?

so I got this ITX form graphics card from MSI where not only the GPU but also the VRM, chokes (do these need to be cooled?) and VRAM are cooled by the heatsink

and weird thing is the memory chips are only partially covered by the thermal pads :
Spoiler!


looks like stupid illogical design but my question is can this cause a heating problem instead of preventing it?

> I mean can this cause a "thermal imbalance" or something with half of the memory chip overheating while only the other half is cooled?


ps. and for the lower right chip only 1/4 is cooled! so will 3/4 of the chip heat up???

Last edited by pulverizor; 03-06-2019 at 04:47 PM.
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post #2 of 16 (permalink) Old 03-06-2019, 04:04 PM
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Only the chip and VRM requires cooling, everything else can cool itself completely passively without any issue at all.

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post #3 of 16 (permalink) Old 03-06-2019, 04:19 PM
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I didn't think you could DP a thread anymore...well without trying.
Oh well.


Quote: Originally Posted by white owl View Post
Not how you post photos...

Nothing stupid about it though. They included some cooling to components that needed none, the core is cooled and the VRM is fully covered.
The only reason you might need to try to cool the ram is when the card is getting no airflow and even then it's not likely to be an issue.

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post #4 of 16 (permalink) Old 03-06-2019, 04:24 PM - Thread Starter
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(@white owl wasnt sure which section to post this so tried both ^^)

so is it risky to have pads cover only half the memory chip? will it cause an "imbalance" where half is cooled & the other half is hot?

I mean woundt it be better not to put thermal pads on the memory than just put half-pads?
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post #5 of 16 (permalink) Old 03-06-2019, 04:38 PM
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It doesn't matter at all. Memory is cold, only HBM dies require active cooling but you obviously don't have HBM.

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post #6 of 16 (permalink) Old 03-06-2019, 04:53 PM - Thread Starter
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other graphics card reviews show memory chips heating up above 80°C which is scary (heat always kills anything in the long run right? or at least makes it less efficient)

here the chips are cooled but only half the surface - does it mean one half gets a lot hotter then the other?

what I mean is suppose I remove those half-pads & replace them with full pads that cover the whole chip (even if the heatsink only touches half the pad) will this improve cooling of the chips?
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post #7 of 16 (permalink) Old 03-06-2019, 10:41 PM
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Quote: Originally Posted by pulverizor View Post
other graphics card reviews show memory chips heating up above 80°C which is scary (heat always kills anything in the long run right? or at least makes it less efficient)

here the chips are cooled but only half the surface - does it mean one half gets a lot hotter then the other?

what I mean is suppose I remove those half-pads & replace them with full pads that cover the whole chip (even if the heatsink only touches half the pad) will this improve cooling of the chips?
A thermal pad that isn't between some sort of heatsink and the chip isn't going to do anything and would probably act more as an insulator (i.e. increasing temps). I'd think it would be best to leave the bare part of the BGA memory chips bare than cover them w/thermal tape.
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post #8 of 16 (permalink) Old 03-06-2019, 11:48 PM - Thread Starter
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Quote: Originally Posted by 8051 View Post
A thermal pad that isn't between some sort of heatsink and the chip isn't going to do anything and would probably act more as an insulator (i.e. increasing temps). I'd think it would be best to leave the bare part of the BGA memory chips bare than cover them w/thermal tape.
even if the thermal pad touches (and covers all of) the chip?

I mean it's the same principle as the IHS of a CPU right?
thermal pads aint metal but they're still thermally conductive so wouldn't it act like some sort of flexible "heat spreader" for the chip? (to balance out the cooler half covered by the heatsink & the hotter half not covered by it)
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post #9 of 16 (permalink) Old 03-09-2019, 02:17 AM
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Quote: Originally Posted by pulverizor View Post
even if the thermal pad touches (and covers all of) the chip?

I mean it's the same principle as the IHS of a CPU right?
thermal pads aint metal but they're still thermally conductive so wouldn't it act like some sort of flexible "heat spreader" for the chip? (to balance out the cooler half covered by the heatsink & the hotter half not covered by it)
Thermal tape works best when it is compressed -- like between some sort of heatsink and the IC it's supposed to cool. Thermal tape can conduct heat but not as well as Al or Cu. Because the exposed thermal tape won't be compressed I'd say leave it off.
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post #10 of 16 (permalink) Old 03-09-2019, 10:22 AM - Thread Starter
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Quote: Originally Posted by 8051 View Post
Thermal tape works best when it is compressed -- like between some sort of heatsink and the IC it's supposed to cool. Thermal tape can conduct heat but not as well as Al or Cu. Because the exposed thermal tape won't be compressed I'd say leave it off.
ok

so what happens with the half covered half bare chips then? like will it be a red/blue hot/cold with one half red hot & the other blue cold (thermal imbalance) or does the chip "balance out" on its own?

I mean chips ain't metal either right? that non-shiny dark grey material that covers all memory chips (whatever it is) looks more like an insulant or something so if a heatsink only touches part of the chip then wont only that part will be cooled & not the whole chip? would the other part still remain hot?
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