COB efficiency Spreadsheets

BOBBY_G

BOBBY_G

Well-Known Member
guod said:
COB-KILLER...
3M™ Double Coated Tissue Tape 9448A



    • Good high temperature holding power
    • Nameplate bonding, plastic film lamination/bonding, splicing, and foam bonding
    • Adhering, joining, affixing, bonding, mounting, holding, laminating, and attaching
------------------------------------------------------------------------------------------------------------------
usefull up to 10 Watt
3M™ Thermally Conductive Adhesive Transfer Tape 88XX
Applications‎
IC Packaging Heat Conduction‎ , Heatsink-Thermal Interface Attachment‎ , Battery Thermal Management‎ , LED Lighting Thermal Management‎ , Heatsink-Thermal Interface-Non Bonding‎ , Flex Bonding‎ , Thermal Interface-Damping-Cushioning‎

full list
http://solutions.3m.com/wps/portal/3M/en_US/Electronics_NA/Electronics/Products/Electronics_Product_Catalog/~/Thermally-Conductive-Interface-Tapes?N=8704987
Click to expand...
10W of what? power dissipation? heat dissipation? if its good for a 10W single die its way overkill for cobs
 
guod

guod

Well-Known Member
BOBBY_G said:
10W of what? power dissipation? heat dissipation? if its good for a 10W single die its way overkill for cobs
Click to expand...
meant for cobs, for single dies at 10 watt forget it....good for 3 Watts monos on Star-MCPCB

3M™ tape 8805 -> Thermal Conductivity‎ 0.60 W/m-K‎
one of the best grease -> Thermal Conductivity‎ 8.5 W/m-K‎
 
T

todd86

Active Member
after much research I choose.

5.15W/mK High Performance Thermal Paste Compund 3g

$3.50 US

High performance / High Quality Thermal Compound / Paste, for CPU / GPU, Heat Sinks, LED etc

Produced by Halnziye (OEM Producer to companies like coolermaster, tuniq, zalman etc)

http://www.halnziye.net/

Because this is an OEM product there are not a lot of comparison reviews online but the following review showing it out performing Tuniq TX-4 should give you a reference point for its real world performance: http://www.pureoverclock.com/Review-detail/hy810-and-hy880-co
mpound-review/

Suitable For Low and High Pressure Coolers

Non Electrically Conductive
Low Bleed
Easy Spread
Easy Clean up
RoHS Compliant

Brand: Halnziye
Model: HY880
Appearance: Grey
Thermal Conductivity: >5.15W/mK
Thermal Impedance:

<0.004 degree C-in2/W
Operating Temperature: -50 - 280 degrees C
Viscosity: 12500
Specific Gravity: >3.25 @ 25 Degrees C

http://www.pureoverclock.com/Review-detail/hy810-and-hy880-compound-review/
 
REALSTYLES

REALSTYLES

Well-Known Member
guod said:
COB-KILLER...
3M™ Double Coated Tissue Tape 9448A



    • Good high temperature holding power
    • Nameplate bonding, plastic film lamination/bonding, splicing, and foam bonding
    • Adhering, joining, affixing, bonding, mounting, holding, laminating, and attaching
------------------------------------------------------------------------------------------------------------------
usefull up to 10 Watt
3M™ Thermally Conductive Adhesive Transfer Tape 88XX
Applications‎
IC Packaging Heat Conduction‎ , Heatsink-Thermal Interface Attachment‎ , Battery Thermal Management‎ , LED Lighting Thermal Management‎ , Heatsink-Thermal Interface-Non Bonding‎ , Flex Bonding‎ , Thermal Interface-Damping-Cushioning‎

full list
http://solutions.3m.com/wps/portal/3M/en_US/Electronics_NA/Electronics/Products/Electronics_Product_Catalog/~/Thermally-Conductive-Interface-Tapes?N=8704987
Click to expand...
Sorry but you are so wrong sir. I got the skivvy on that tape the 3M part is right 9448A is the adhesive that was applied to the thermal padding that is rated at 4w/mk

thermal tape.png

thermal tape 2.png

Btw the engineers over at Kingbrite tested it plus they giving it away not trying to charge for it which is pretty cool in my book. @guod sorry man but you made a mistake lol we all do it at least I know you're human and the adhesive can handle 70C long term it's says it on the datasheet I was looking at because the part number didn't jive when I looked it up. I'm gonna call 3M on Monday to see if they do that.
 
T

todd86

Active Member
REALSTYLES said:
Sorry but you are so wrong sir. I got the skivvy on that tape the 3M part is right 9448A is the adhesive that was applied to the thermal padding that is rated at 4w/mk

View attachment 3744832

View attachment 3744833

Btw the engineers over at Kingbrite tested it plus they giving it away not trying to charge for it which is pretty cool in my book. @guod sorry man but you made a mistake lol we all do it at least I know you're human and the adhesive can handle 70C long term it's says it on the datasheet I was looking at because the part number didn't jive when I looked it up. I'm gonna call 3M on Monday to see if they do that.
Click to expand...
Interesting thanks realstyles.... I could have used the free pads after all.

My cobs are running so cool the heat sinks are not even warm to the touch. I really wonder if I needed these 8 x 1.4kg heavy heat sinks i got, my room is only 1 degree Celsius hotter in a 4x4 tent.

This system is built to last the century, split one plant trying to hang this heavy beast of a thing myself but it will recover fine.
 

Attachments

V

voon

Well-Known Member
02-Air-Cooling-High-Pressure.png
REALSTYLES said:
Sorry but you are so wrong sir. I got the skivvy on that tape the 3M part is right 9448A is the adhesive that was applied to the thermal padding that is rated at 4w/mk

View attachment 3744832

View attachment 3744833

Btw the engineers over at Kingbrite tested it plus they giving it away not trying to charge for it which is pretty cool in my book. @guod sorry man but you made a mistake lol we all do it at least I know you're human and the adhesive can handle 70C long term it's says it on the datasheet I was looking at because the part number didn't jive when I looked it up. I'm gonna call 3M on Monday to see if they do that.
Click to expand...
Arctic Thermal Pad
Their job is not to replace the thermal grease used between the heat sink and powerful components (mainly CPU, APU, GPU), but rather will be used for VRM power, memory and other components less heat .. although I think that will be sufficient for use in case CPU COB .. and one of the worst results in a thermal adhesive 0.9 watts / mK, i think it would be enough .. difference of about 4 ° C compared Prolimatech PK1 .. and whether 3M thermal pad 3-4 watts / mK will serve more than well for COB .. like Arctic Thermal Pad 6 watts / mK
 

Attachments

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V

voon

Well-Known Member
thermal grease.png
It's funny and a fun that even some mayonnaise or mustard provides enough heat conducting results .. You may begin your COB anoint them :-D .. perhaps too much to think about it and do the difficult thing

I think that these cheap thermal pad will do their works well enough;-)

http://www.aliexpress.com/item/Blue-100x100x2mm-GPU-CPU-SMD-DIP-IC-Silicone-Compound-Conductive-Thermal-Pad/2055672798.html?ws_ab_test=searchweb201556_7,searchweb201602_5_10057_10056_10055_10049_10059_10058_10017_405_404_10060_10061_10062_412,searchweb201603_7&btsid=dc6092e4-30ec-4d5a-8e85-9a7aa8364837

http://www.aliexpress.com/item/16-pcs-LOT-Blue15x15x1mm-GPU-CPU-SMD-DIP-IC-Compound-Conductive-Mini-Silicone-Thermal-pad-for/32669224298.html?ws_ab_test=searchweb201556_7,searchweb201602_5_10057_10056_10055_10049_10059_10058_10017_405_404_10060_10061_10062_412,searchweb201603_7&btsid=dc6092e4-30ec-4d5a-8e85-9a7aa8364837
 
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Bubblin

Bubblin

Well-Known Member
voon said:
View attachment 3745195
Arctic Thermal Pad
Their job is not to replace the thermal grease used between the heat sink and powerful components (mainly CPU, APU, GPU), but rather will be used for VRM power, memory and other components less heat .. although I think that will be sufficient for use in case CPU COB .. and one of the worst results in a thermal adhesive 0.9 watts / mK, i think it would be enough .. difference of about 4 ° C compared Prolimatech PK1 .. and whether 3M thermal pad 3-4 watts / mK will serve more than well for COB .. like Arctic Thermal Pad 6 watts / mK
Click to expand...
I love the results for the adhesive cream for dentures.


BOBBY_G said:
ill bet when it comes down to it you can take any of those top 20 or 30 products and the performance is even moreso a function of the person applying it
Click to expand...
This ^
People always put on way way toooo much. It's meant to be used in a layer that's measured @ a few thousands of an inch.
 
ttystikk

ttystikk

Well-Known Member
voon said:
View attachment 3745200
It's funny and a fun that even some mayonnaise or mustard provides enough heat conducting results .. You may begin your COB anoint them :-D .. perhaps too much to think about it and do the difficult thing

I think that these cheap thermal pad will do their works well enough;-)

http://www.aliexpress.com/item/Blue-100x100x2mm-GPU-CPU-SMD-DIP-IC-Silicone-Compound-Conductive-Thermal-Pad/2055672798.html?ws_ab_test=searchweb201556_7,searchweb201602_5_10057_10056_10055_10049_10059_10058_10017_405_404_10060_10061_10062_412,searchweb201603_7&btsid=dc6092e4-30ec-4d5a-8e85-9a7aa8364837

http://www.aliexpress.com/item/16-pcs-LOT-Blue15x15x1mm-GPU-CPU-SMD-DIP-IC-Compound-Conductive-Mini-Silicone-Thermal-pad-for/32669224298.html?ws_ab_test=searchweb201556_7,searchweb201602_5_10057_10056_10055_10049_10059_10058_10017_405_404_10060_10061_10062_412,searchweb201603_7&btsid=dc6092e4-30ec-4d5a-8e85-9a7aa8364837
Click to expand...
I'd like a thermal paste on rye, with the hot bologna...
 
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