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.