Honeywell ptm7950 experience for gpu :)

[Taraquin]

Ptm7950 is a phase changing coolingpad/paste that turn liquid above 45C. It is used in industrial settings, on ledbulbs, but has recently become popular in notebooks and gpus. The Lenovo legion uses it aswell as Nvidia 4090 FE and perhaps other FE models aswell. It is a lot more expensive than most pastes and harder to apply, but longevity is supposedly many years. It also needs a many hours to perform at its best due to the melting process. I got a 40x80mm kit for 13usd on ebay.

My 4070 die is 15x20mm so I can do several applications with this. I put it in the freezer for 10mins, used a scissor to cut after measuring.

Application was somewhat tricky as it has a thin plastic film on both sides. Succeded after a few minutes.

I had reapplied Arctic MX-6 3 times after I got pump out the 2 first after using max mounting pressure. The stock temps where 59C core 83C hotspot. The last atempt with MX-6 was much better at 57-71C.

Then came ptm7950

Vs stock the result is amazing. 5C lower core, 11.5C delta vs 24C. Also a nice improvement
from MX-6 with 3C lower core and 5.5C lower delta The temps started of worse at 55C and 67C delta, but got better after a few hours.

Overall very satisfied

Before you buy: This is not a good solution for everything. On direct die it performs best. On IHS it may not perform as good due to lower heat on parts of the IHS that may not reach the necessary 45C+. On goodwatercooling it will probably perform bad if temps never pass 45C. It is not easy to apply, but cooling it down before use helps a lot

 

[StarlightGalaxi]

Sweet resaults! I plan on buying PTM7950 for my 4070 Ti TUF I can find it cheap at LTTstore.com 60mm x 60mm sheet for $15 I repasted my card with MX-6 3 times and the paste pumped out super fast in about 2-3 days and hotspot started to rise gradually can't wait to get this stuff next week.

 

[Lewzke]

Ptm7950 is a phase changing coolingpad/paste that turn liquid above 45C. It is used in industrial settings, on ledbulbs, but has recently become popular in notebooks and gpus. The Lenovo legion uses it aswell as Nvidia 4090 FE and perhaps other FE models aswell. It is a lot more expensive than most pastes and harder to apply, but longevity is supposedly many years. It also needs a many hours to perform at its best due to the melting process. I got a 40x80mm kit for 13usd on ebay.
View attachment 343136

My 4070 die is 15x20mm so I can do several applications with this. I put it in the freezer for 10mins, used a scissor to cut after measuring.
View attachment 343138
Application was somewhat tricky as it has a thin plastic film on both sides. Succeded after a few minutes.
View attachment 343139

I had reapplied Arctic MX-6 3 times after I got pump out the 2 first after using max mounting pressure. The stock temps where 59C core 83C hotspot. The last atempt with MX-6 was much better at 57-71C.
View attachment 343140

Then came ptm7950
View attachment 343141

Vs stock the result is amazing. 5C lower core, 11.5C delta vs 24C. Also a nice improvement
from MX-6 with 3C lower core and 5.5C lower delta The temps started of worse at 55C and 67C delta, but got better after a few hours.

Overall very satisfied

Before you buy: This is not a good solution for everything. On direct die it performs best. On IHS it may not perform as good due to lower heat on parts of the IHS that may not reach the necessary 45C+. On goodwatercooling it will probably perform bad if temps never pass 45C. It is not easy to apply, but cooling it down before use helps a lot

It performs well on IHS too, if the die is 80 Celsius the IHS should be more than 45C in every area

 

[StarlightGalaxi]

It performs well on IHS too, if the die is 80 Celsius the IHS should be more than 45C in every area

It could work well on CPU's but it's not ideal as thermal paste doesn't pump out as bad on a IHS like it does on direct die this is why laptop manufacturers and GPU manufaturers use this stuff adding it on a desktop CPU would be way more expensive as well due to the size of the CPU I would only use PTM7950 on direct die honestly less constly as well.

 

[Lewzke]

It could work well on CPU's but it's not ideal as thermal paste doesn't pump out as bad on a IHS like it does on direct die this is why laptop manufacturers and GPU manufaturers use this stuff adding it on a desktop CPU would be way more expensive as well due to the size of the CPU I would only use PTM7950 on direct die honestly less constly as well.

I agree, it is not ideal for IHS from financial perspective, but if you have spare you can use it on IHS too. I use PTM for notebooks and GPU's, but I dont have PC.
Also if you ever delid, the PTM is ideal for replacing the thermal interfaces without shortcircuit risk.

 

[Taraquin]

It performs well on IHS too, if the die is 80 Celsius the IHS should be more than 45C in every area

I get same redults as MX6 on IHS. It doesnt perform bad, it is about even with MX6 which is quite good. Application and price however is worse vs MX6.

I agree, it is not ideal for IHS from financial perspective, but if you have spare you can use it on IHS too. I use PTM for notebooks and GPU's, but I dont have PC.

It is superb for gpus and notebooks, also direct die cpus with aircooling. Almost liquid metal performance, but none of the drawbacks like conductivity, reaction with cooler and much better longevity Nvidia uses it on 4090 FE, that is a clear sign of how good it is It's about the same as regualer paste on ihs. On very good watercooling it may perform worse than paste, but it's like 42C vs 38C.

 

[Lewzke]

I get same redults as MX6 on IHS. It doesnt perform bad, it is about even with MX6 which is quite good. Application and price however is worse vs MX6.


It is superb for gpus and notebooks, also direct die cpus with aircooling. Almost liquid metal performance, but none of the drawbacks like conductivity, reaction with cooler and much better longevity Nvidia uses it on 4090 FE, that is a clear sign of how good it is It's about the same as regualer paste on ihs. On very good watercooling it may perform worse than paste, but it's like 42C vs 38C.

Yeah, it is not worth it for IHS, you can find normal Deepcool paste even cheaper than MX6 with the same performance. Deepcool Z5,Z9,Z10 (avoid Z3) is pretty damn good. For me the sheet version of the PTM is painfully hard to apply, even after freezing it it's difficult peel off properly. I have already ordered the SP paste version of PTM to give a try next time, theoretically the application is like regular paste, except that you have to dry out the solvent after application, but that can be done with a regular hair dryer. I rather do the waiting than the freezer + razor method with surgical precision.

 

[tabascosauz]

Overall very satisfied

Before you buy: This is not a good solution for everything. On direct die it performs best. On IHS it may not perform as good due to lower heat on parts of the IHS that may not reach the necessary 45C+. On goodwatercooling it will probably perform bad if temps never pass 45C. It is not easy to apply, but cooling it down before use helps a lot

Nice results! I'll probably get some for 4070 Ti and 6900HS/6700S.

For IHS CPU I think Kryosheet might be the better premium choice between the two.

 

[StarlightGalaxi]

I just got my PTM7950 today and applied it to my 4070 Ti it was rather simple to apply and I'm seeing very consistant temps so far between core and hotspot as well as 3C lower than freshly applied MX-6 I'm curious how it'll perform in a week since that's when MX-6 pumped out super bad for me.

 

[wolf]

I've had a few good experiences with PTM7950 now. 7950GT shaved off a few degrees immediately, and multiple GT 730's refurbished for extreme longevity. I did notice with those the temps improved after a few hours of use too.

What's a bonus is it's dirt cheap for how much you get IMO, I see myself using this with most of my hardware from now on, unless similar alternatives perform even better, like Thermal Grizzly's Kryosheet.

 

[StarlightGalaxi]

I've had a few good experiences with PTM7950 now. 7950GT shaved off a few degrees immediately, and multiple GT 730's refurbished for extreme longevity. I did notice with those the temps improved after a few hours of use too.

What's a bonus is it's dirt cheap for how much you get IMO, I see myself using this with most of my hardware from now on, unless similar alternatives perform even better, like Thermal Grizzly's Kryosheet.

I think I did a good job and yeah so much better than regular pastes for sure at the moment if it stays consistant I'll use this stuff instead of paste indefinitely.

 

[Chomiq]

Vs stock the result is amazing. 5C lower core, 11.5C delta vs 24C. Also a nice improvement

Actually that's 11.5 C vs 14 C delta.

 

[Frick]

I will try this at some point. It made a massive difference for the laptop (in sig), and there's plenty left of the sheet I bought.

 

[Taraquin]

I just got my PTM7950 today and applied it to my 4070 Ti it was rather simple to apply and I'm seeing very consistant temps so far between core and hotspot as well as 3C lower than freshly applied MX-6 I'm curious how it'll perform in a week since that's when MX-6 pumped out super bad for me.

It should perform better with time. You may have to tighten the screws a bit since it will liquify.

Actually that's 11.5 C vs 14 C delta.

It was 24C delta when GPU-mining 14C when gaming. Now it is never above 12C delta when gaming, usually only 5-10C.

 

[StarlightGalaxi]

It should perform better with time. You may have to tighten the screws a bit since it will liquify.


It was 24C delta when GPU-mining 14C when gaming. Now it is never above 12C delta when gaming, usually only 5-10C.

5 days of PTM and my temperatures are the exact same of when I added it that's pretty impressive, my delta is never really above 12C either only in certain benchmarks but that's just spiking and yeah I tightened the screws as much as possible.

 

[Taraquin]

5 days of PTM and my temperatures are the exact same of when I added it that's pretty impressive, my delta is never really above 12C either only in certain benchmarks but that's just spiking and yeah I tightened the screws as much as possible.

I mean you may have to tighten the screws after a few days of use since it transforms

 

[StarlightGalaxi]

I mean you may have to tighten the screws after a few days of use since it transforms

Oh I see, I just checked the screws and they're still tight.

 

[Caring1]

How easy is this stuff to remove, does it wash off as easily as regular thermal pastes?

 

[StarlightGalaxi]

How easy is this stuff to remove, does it wash off as easily as regular thermal pastes?

Just use IPA it's just like regular thermal paste.

 

[Lewzke]

It's easy to remove, it is not that sticky as some stock dried pastes but not as easy as MX4. The application is the difficult part.

 

[Makaveli]

I just added PTM 7950 on my 7900XTX

primary gpu temps are fine but i'm not seeing much reduction in hot spot temps. How much time does it need to settle in ?

I may have spoken too soon i'm seeing lower hotspot temps in games and benchmarks Its only AIDA gpu stress test has has it going much higher.

 

[Taraquin]

It will perform better after a few hours of use, how much better I dunno.

 

[Ruru]

Has anyone tried this on a Radeon HD 7950?

It will perform better after a few hours of use, how much better I dunno.

Having some cure/burn-in time is pretty normal for some TIMs.

 

[wolf]

Has anyone tried this on a Radeon HD 7950?

Unfortunately only the similarly named GeForce 7950GT Great results though, better than MX4 or AS5 so far in my uses. The HD7950 has a considerably larger die size, but I don't suspect that will alter much difference relatively speaking.

 

[Lewzke]

I just added PTM 7950 on my 7900XTX

primary gpu temps are fine but i'm not seeing much reduction in hot spot temps. How much time does it need to settle in ?

It gets better gradually over time, acording to Honeywell datasheets it can be 200 hours of usage. Even after 1000 hours it will be slightly better but probably not noticeable anymore. The first 200 hour probably visible. (around 3 months of usage) After 1000 hours there is no data about the paste, but until 1000 the paste is not degrading at all.