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775tm1 vs p751tm1 heatsinks


Estens

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On 8/17/2023 at 6:25 PM, Estens said:

Are the heatsinks for p775tm1 and p751tm1 the same or interchangable?

They are different size, as is the 775 is wider, the same applies to the heatsink. In the ZM (4.gen desktop) they are the same , but after that they are not compatible. It can cool same amount of heat btw.

HP Omen Transcend 16 13700HX/32GB 4800mhz/RTX 4070 105W/QHD 240Hz IPS.

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  • 2 months later...
On 8/17/2023 at 9:25 AM, Estens said:

Are the heatsinks for p775tm1 and p751tm1 the same or interchangable?

 

It may be a little late of an answer, but I looked into this specifically and did it to a small degree of success, but I needed to cut my bottom case to fit the heatsink.  I have pictures, but it is on my other laptop so I need to find it and post it up once I do get it.  So yes it can be done, but the fins on the heatsink are larger and will stick out the rear some.

 

On 8/22/2023 at 12:05 PM, Csupati said:

They are different size, as is the 775 is wider, the same applies to the heatsink. In the ZM (4.gen desktop) they are the same , but after that they are not compatible. It can cool same amount of heat btw.

 

I doubt that they can cool to the same degree, the actual fins on the end that the fan blows through has a decent amount more surface area for the fans to cool.  I am 99% sure the heatsinks on the P775TM dissipate heat better than the P750 does - even if technically they are rated to hold the same watt hardware.  At least that was my experience.

  • Previous lives: D900F / P150HM / P150EM / X170KM
  • P870DM3 **Pending . . .**
  • The daily: P750DM2  *Build Thread*:  8700k / 32GB 3200mhz CL16 / GPU?
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On 8/17/2023 at 8:11 PM, MiRaGe said:

No to my knowledge. 

 

On 8/17/2023 at 6:25 PM, Estens said:

Are the heatsinks for p775tm1 and p751tm1 the same or interchangable?

Exactly, they don't match and are not interchangeable.

You can only either buy new heatsinks for the RTX30xx series, if they are available for the p750DM2, or I have adapters with which it is possible to screw on the RTX30xx. The P750DM2 went up to the GTX10xx series so this is possible!

Greetz

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Found some old pictures when I was trying this myself. 

 

Here is the heatsink for a P750TM (I think could be P750DM2):

 

nGxLWO9.jpg

 

Now here is an example of P775TM (or P775DM2) installed in a P750DM2

 

qan8AJB.jpg

 

You can see the fins stick past the end of the notebook, but otherwise seem to fit.  The other issue that you can't really see is that the depth of the P775 heatsink is also more than the slot for the fin section so it lifts up the heatsink just a little bit, just enough to make it not have perfect contact. And if you bend the heatpipes to get it to fit it will obstruct the air that is moving in the heatpipes to cool the GPU / CPU.  Soooooo if you REALLY want to make it fit, you need to cut out around the fins to make it fit. Honestly not worth it and the rear is then fragile and you have to be careful not to bend the fins by accident. 

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Found some more pictures:

 

Top is P775, bottom is P750, circled in red is where the fins stick out and where the pipe on the CPU heatsink it needed to be bent to fit. 

 

mMbbnK1.jpg

 

See from the top the different sizes:

 

8kZ6QAI.jpg


Red circled area is where I had to slightly bend the heatpipes up for the P775 to fit:

 

TaeypOz.jpg

 

Back side of the P750 showing how much the fins stick out past the case:

 

BSwzdXn.jpg

Kud4gKY.jpg

 

Here you can see how much I cut of the bottom enclosure to fit the fins:

 

J7GRVPA.jpg

Af57wQ9.jpg

 

 

 

So as you can see I do think the P775 has better cooling than the P750 even if on paper they say they can cool the same wattage. 

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56 minutes ago, razor0601 said:

Here are also two Heatsinks for GTX Series. On the left comes from P751TM1 on the right from P751DM2.

Which one is the better for cooling?

Honestly not sure, I think the both do well but are for different setups.  The one on the right has a heatsink pipe diverted from the GPU to CPU so that one might be able to handle a heavier CPU wattage while not being able to handle as high watt of a GPU, while the one on the left tries to balance it out between the CPU and GPU with more even power usage.  Why don't you test it?  I will try and test mine later on this year and see what is more effective.  But I imagine it would depend on setup.

  • Previous lives: D900F / P150HM / P150EM / X170KM
  • P870DM3 **Pending . . .**
  • The daily: P750DM2  *Build Thread*:  8700k / 32GB 3200mhz CL16 / GPU?
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The right one has also a fin over the Mosfets. Maybe better for GTX 1080.

But I have only 1060 here to test. I don’t think there are to much differences with the 1060

Schenker DTR 15(P751TM1) @Dsanke Bios, I7-8700, 32GB 2666MHz RAM, GTX 1060, 15,6“ 4K B156ZAN02.2 Display

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