Precision 7550 & Precision 7750 owner's thread

[reise]

Hi everyone. I've read the topic, but I still need some advice. I have a DELL PRECISION 7750, and unfortunately, as is well known, it has inherent thermal issues. Even when just turned on at idle, it easily reaches 100°C. The heat sinks, fans, and thermal paste are in the same factory condition (as in fact, the 7750's CPU reached 100°C even when new). I could certainly install the best thermal compound available, but what would change? 5°C, maximum 10°C, and that would be insufficient, because it would still thermal throttle. In the BIOS/UEFI, no matter what option I change (SGX, SpeedSpep, C-State, Speed Shift or Thermal Management), I get no resolutions, but only unacceptable compromises. For example, with Thermal Management in Cool, the frequencies are limited to around 3GHz in multicore, so it doesn't go into thermal throttling (or almost), but with very reduced performance. What can I do to defeat the monstrous temperatures of CometLake-H?

[JamieTheAnything]

On 1/22/2026 at 7:45 PM, reise said:

Hi everyone. I've read the topic, but I still need some advice. I have a DELL PRECISION 7750, and unfortunately, as is well known, it has inherent thermal issues. Even when just turned on at idle, it easily reaches 100°C. The heat sinks, fans, and thermal paste are in the same factory condition (as in fact, the 7750's CPU reached 100°C even when new). I could certainly install the best thermal compound available, but what would change? 5°C, maximum 10°C, and that would be insufficient, because it would still thermal throttle. In the BIOS/UEFI, no matter what option I change (SGX, SpeedSpep, C-State, Speed Shift or Thermal Management), I get no resolutions, but only unacceptable compromises. For example, with Thermal Management in Cool, the frequencies are limited to around 3GHz in multicore, so it doesn't go into thermal throttling (or almost), but with very reduced performance. What can I do to defeat the monstrous temperatures of CometLake-H?

I would rec. a thermal repaste along with replacing the thermal pads with thermal putty. It seems like your machine might not have the entire Die being in contact with the heatsink. at idle it shouldnt be at 100C, even when stressed it should get up to 100 but still be around 4.2-4.3ghz all core under load. (optimized fan preset). With my 7550 I have yet to repaste it since getting it, so it should be using the original paste and that has been my experience. After getting fresh and enhanced paste should improve things dramatically. 

Most cpu's that have absolutely cracked and dried out paste will show what you're experiencing, repasting it and also replacing the pads for the CPU with putty would be your best bet of getting things under control thermally. 

[JamieTheAnything]

Alright so update to the whole project, I'm going to be using a very thin .2mm sheet of copper to connect between the heatsink, the inductor, and the mosfets. 

 

The order from top to bottom 

 

Heatsink->Paste->CopperShim->Putty->Inductors, and using a Motherboard->Putty->shim->paste->Mosfet sandwich on the mosfet side. Hopefully this will guarantee that the poor mosfets won't dump all of it's heat into the motherboard while also ensuring that the "quickest" path to the heatsink is given to the mosfets. 

[JamieTheAnything]

it works but I need to add a copper shim to better the contact between the heatsink and the GPU die. thankfully based on the thermal paste pattern it looks to be about the sise of the Copper film I already purchased. 

 

will update with further developments.

[JamieTheAnything]

I put 3 copper shims in however I think only one would've worked. Each one of them is .2mm so it's roughly .6mm right now however I was seeing much better results with just one .2mm shim thanks to the losses due to stacking thermal paste->shim->thermal paste too many times.  In any case I'm glad that it's working properly and not throttling anymore even with the 105W bios. 3Dmark tests below. 

 

 

 

 

 

Please also note you will have to remove this post in order for the gpu to fit.
 
 

[JamieTheAnything]

On 1/21/2026 at 10:50 AM, Aaron44126 said:

 

If you can "make it fit" (and I would genuinely love to see that), then it will probably work. I have never heard of this being done, but... The physical interface is the same. I don't think there will be an issue with needing to modify the NVIDIA driver INF.

Bow before my monstrosity 

For I have done it

https://www.3dmark.com/3dm/151229648

[Aaron44126]

Good to know that it's possible!