Friday, July 26th 2024

Thermal Grizzly Presents PhaseSheet PTM Thermal Pad

Press Release by
Nomad76
 Discuss (61 Comments)
With the PhaseSheet PTM, Thermal Grizzly Holding GmbH presents an electrically non-conductive thermal pad based on a phase change material (PCM). With PhaseSheet PTM, Thermal Grizzly closes the gap between traditional thermal paste and thermal pads based on graphene or carbon thermal pads. This means that the respective advantages in terms of application and thermal conductivity can be combined in one product.

PhaseSheet PTM is a thermal pad that has been optimized for applications where maintenance cycles are subject to long intervals. It is more durable than traditional thermal conductive pastes, but not as durable as KryoSheet, for example, which is virtually maintenance-free. The maximum thermal conductivity of PhaseSheet PTM develops and stabilizes after around ten thermal cycles above 60 degrees Celsius.
Compared to traditional thermal paste, PhaseSheet PTM retains a very low viscosity in its liquid state and contracts again when it changes to a solid, so that the so-called "pump-out" effect is only very slight. With the pump-out effect, the thermal paste is pressed out over time, for example between the heat spreader and the base plate of the CPU cooler.

Applications for the PhaseSheet PTM include replacing the thermal paste on older graphics cards or converting to water cooling. Notebooks also benefit greatly from PhaseSheet PTM due to their cooler design and the thermal pad can also be used between processors and CPU coolers.

The advantages of PhaseSheet PTM at a glance:
  • Outstanding thermal conductivity
  • Consistently high performance
  • Very long service life
  • Versatile in application
  • Not electrically conductive
  • Easy to use
Thermal Grizzly PhaseSheet PTM have a retail price of $10.59.
Source: Thermal Grizzly

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61 Comments on Thermal Grizzly Presents PhaseSheet PTM Thermal Pad

#26
A Computer Guy
R0H1TI've been using couple of 970 EVO+ in an x570 for 3(4?) years now at 60-70c load temps with no issues. Have more writes on one of them than the drive you mentioned in that thread. It's almost certainly not due to temps, but every SSD is different so who knows?

There's two temps reported on the SSD, the higher one is for controller IIRC so that's the one I'm quoting.
The drives are fine and working without issues. After securing the chipset heatsink the drives are all working fine again too. I suspect the lack of mounting pressure on the chipset heatsink caused poor contact and allowed the chip to overheat to failure causing the NVMe drives to disconnect.
Posted on Reply
#27
R0H1T
Sounds odd because I probably could have the highest ambient temps going around, but yeah you do run the 5950x as against 5800x on mine currently.
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#28
Philaphlous
Definitely much more reliable of a supplier than some 2nd market ebay crap or amazon reseller... I trust this way more to be genuine...
Posted on Reply
#29
dalekdukesboy
Dr. DroDefinitely cheaper than PTM7950, that's for sure. Hope it works just as well
Yes!
Posted on Reply
#30
Pepamami
Vayra86PTM hype has now officially reached le gamur. I cant wait for all the GPUs repasted into oblivion :)
PTM is bad for business, because u dont have to repaste PTM "every month due pump out effect".
Posted on Reply
#31
Ferrum Master
PepamamiPTM is bad for business, because u dont have to repaste PTM "every month due pump out effect".
With business like Intel does, it is covered, no stress, you have to RMA or change your CPU more often :D
Posted on Reply
#32
A Computer Guy
Ferrum MasterWith business like Intel does, it is covered, no stress, you have to RMA or change your CPU more often :D
A perfect opportunity to reintroduce the slot based cpu.
Posted on Reply
#33
TheDeeGee
Dr. DroDefinitely cheaper than PTM7950, that's for sure. Hope it works just as well
LTT is certainly out of business for PTM in the EU now ^^
phanbueyhonestly just use the kryosheet - much better.
Applied a Kryosheet to my 4070 Ti this week, dropped temps by 10-12C.

I never have to repaste it again ^^
Posted on Reply
#34
phanbuey
TheDeeGeeLTT is certainly out of business for PTM in the EU now ^^


Applied a Kryosheet to my 4070 Ti this week, dropped temps by 10-12C.

I never have to repaste it again ^^
I had to replace the PTM7950 on my 4090 after 8 months TWICE - first time I thought maybe factory sheet wasn't put on right, but soon it started hotspotting at 104C and sounding like a jet in the process -- did kryosheet, havent touched it since, temps as good as day1. Have it on my CPU as well - it's the best feeling not to have to think about repaste.
Posted on Reply
#35
pattesatan
Caring1It's fairly low thermal conductivity.
Thermal Conductivity（W / m-k)：8.5 W/mk
There are thermal pastes with a higher rating.
I'd expect a thermal pad/ sheet to be around 50W/mK or higher

I've contacted Thermal Grizzly and requested info on their PTM's thermal rating as their downloaded Data sheet is useless and contains nothing that isn't stated already on their website.
You wont see any improvements until its "burned in", but it is way better than any thermal paste.
Posted on Reply
#36
sLowEnd
Caring1"Outstanding thermal conductivity"
So what rating is it? (W/mK)
Thermal conductivity is not a useful number to compare products between manufacturers (or even within the same manufacturer, if methods are not consistent), because of how it is derived and how it can be manipulated
Posted on Reply
#37
eidairaman1
The Exiled Airman
pattesatanOne more thing, is that it is very easy to apply, as it has 2 very different "sides" or what I should call it, the plastic shit on both sides, so its easy to not do wrong.
So they made it idiot proof
Posted on Reply
#38
Caring1
Lewzkethat 8.5W/mK is an average value in the market, but PTM is not about pure thermal conductivity, it is about zero pump-out effect, longetivity and low thermal resistance (if the pressure condition is met). Basically it is for bare silicon chip cooling (notebooks, GPU's and delidded CPU's). Lenovo uses for notebooks, Nvidia used for 4090, automotive industry for amps/chips, aviation for ... etc. (it is the best non conductive solution for direct die cooling, no question) I used PTM7950 several times and the only negative thing about this material is the application procedure (difficult to apply, freezer and razor involved) - so I ordered PTM7958SP (paste version - but this needs drying process)
I know what it is and what it does, thanks.
PepamamiPTM is bad for business, because u dont have to repaste PTM "every month due pump out effect".
"Pump out affect"
When people put on too much thermal paste and don't know how it works.
It is NOT meant to retain a thick layer between the die and cooler, it is meant to fill the minor irregularities only.
Posted on Reply
#39
Lewzke
The pumpout is related to the material bond structure, PTM structural bond is a lot higher than a regular paste, that is why even at high pressure the thin layer remains in the contact surface, contrary to a regular paste which slowly drifts out to the sides.
Posted on Reply
#40
ARF
Caring1It's fairly low thermal conductivity.
Thermal Conductivity（W / m-k)：8.5 W/mk
There are thermal pastes with a higher rating.
I'd expect a thermal pad/ sheet to be around 50W/mK or higher

I've contacted Thermal Grizzly and requested info on their PTM's thermal rating as their downloaded Data sheet is useless and contains nothing that isn't stated already on their website.
Lewzkethat 8.5W/mK is an average value in the market, but PTM is not about pure thermal conductivity, it is about zero pump-out effect, longetivity and low thermal resistance (if the pressure condition is met). Basically it is for bare silicon chip cooling (notebooks, GPU's and delidded CPU's). Lenovo uses for notebooks, Nvidia used for 4090, automotive industry for amps/chips, aviation for ... etc. (it is the best non conductive solution for direct die cooling, no question) I used PTM7950 several times and the only negative thing about this material is the application procedure (difficult to apply, freezer and razor involved) - so I ordered PTM7958SP (paste version - but this needs drying process)
8.5 W/m.K is very low and poor performance. The Kryonaut is rated at 12.5 W/m.K.
Posted on Reply
#41
Lewzke
ARF8.5 W/m.K is very low and poor performance. The Kryonaut is rated at 12.5 W/m.K.
Yet the Kryonaut will fall short in performance - when used in direct die scenario. Just try it. :D
Posted on Reply
#42
ARF
LewzkeYet the Kryonaut will fall short in performance - when used in direct die scenario. Just try it. :D
People use liquid metal. 70-80 W/m.K. :D
Posted on Reply
#43
Lewzke
ARFPeople use liquid metal. 70-80 W/m.K. :D
I work on my laptop, I cannot afford the risk of shorting the motherboard so I am searching for the best non-conductive solutions. Also the longetivity is questionable - it will corrode (copper heatsink). Maybe if I run a desktop PC delidded.
Posted on Reply
#44
stimpy88
So is it a thing that a Kryosheet is better than thermal paste? I know it's a use once solution, but is it actually better than a near top-of-the-line thermal paste now?
Posted on Reply
#45
R-T-B
stimpy88So is it a thing that a Kryosheet is better than thermal paste? I know it's a use once solution, but is it actually better than a near top-of-the-line thermal paste now?
I used it and it improved my temps over an older application of Arctic Cooling MX-4. Take that for whatever its worth.
Posted on Reply
#46
Shrek
Seems they see "pump-out" as a thing.
Posted on Reply
#47
R-T-B
ARF8.5 W/m.K is very low and poor performance. The Kryonaut is rated at 12.5 W/m.K.
W/m.K is not the only metric in thermal performance and is highly misleading on its own.
Posted on Reply
#48
TheDeeGee
phanbueyI had to replace the PTM7950 on my 4090 after 8 months TWICE - first time I thought maybe factory sheet wasn't put on right, but soon it started hotspotting at 104C and sounding like a jet in the process -- did kryosheet, havent touched it since, temps as good as day1. Have it on my CPU as well - it's the best feeling not to have to think about repaste.
Good to know, because initially i was gonna try and get TPM. But since i'm from the EU getting the legit one was tough.

So i got the 50x50 Kryosheet for €22 incl shipping at a online store in my country, and now i have enough left for another 3 GPU's.
Posted on Reply
#49
ARF
R-T-BW/m.K is not the only metric in thermal performance and is highly misleading on its own.
Care to bring more details?
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