PHVM_BR

2x32gb Ripjaws 5600MHz CL40.

Sunon. I change the heatsink assembly to install an RTX 4000 and was able to check. Both the original set and the new have Sunon fans.

Yes, it is the 90W VBIOS for Precision 7550. I even updated it. For comparison, on the graphics score in Time Spy: Quadro T2000 (60W): ~3620 Clock avg: ~1785MHz Quadro RTX4000 (80W): ~6930 Clock avg: ~1230MHz Quadro RTX4000 (90W): ~7530 Clock avg: ~1360MHz i7-9750H/T2000 vs i7-9750H/RTX 4000 (80W) vs i7-9750H/RTX 4000 (90W) vs i9-9980HK/RTX 4000 (90W) Result (3dmark.com) For now I'm using the Dell thermal paste that came applied to the new heatsink. When the new motherboard with i9 arrives I will exchange it for PTM 7950 so I should see some gain, although the thermals are under control in Time Spy (maximum: CPU 78°C and GPU 64°C).

The RTX 4000 and the compatible heatsink assembly arrived and I have already installed it to test. Everything perfect! I'm quite satisfied with the upgrade. The motherboard with i9-9880H hasn't arrived yet... I have some doubts: 1- Is it possible to adjust undervolt/overclock with MSI Afterburner on the Quadro RTX 4000 using a specific driver? 2- I'm going to update the VBIOS with the 90W version of the Precision 7550, but I would really like a 110W VBIOS like the 7740/7750. Has anyone gotten 110W on the RTX 4000 on a Precision 7540?

what is the TGP reported in the Nvidia control panel of the RTX 3500 Ada on the Precision 7680 originally?

I finally updated the BIOS from 1.24 to the latest available 1.29 and the undervolt is still unlocked. This confirms what I wrote some time ago, from an old BIOS update (1.08 or 1.09 if I'm not mistaken) the undervolt was blocked but just reset to factory default in the BIOS and it is released again.

Were you able to unlock the PL1 value in BIOS? A 7680 with PTM 7950, undervolt, 115W PL1 and 2x32gb 5600MHz Ripjaws would be what I was looking for...

What is the connection between XMP memory and undervolt?

I finally bought the motherboard with i9-9880H for my Precision 7540. I paid 300 USD for a new one in the original packaging. I also bought a “new” RTX 4000 open box also for 300$ and the appropriate set of heatsink with fans for another 50$. When it arrives and everything is in place I will post here the results and the comparison with the original specifications (i7-9750H and Quadro T2000).

This memory is compatible with Alienware M16/M18 and it appears that it activates the XMP profile automatically to run at 5600MHz CL40 with 2x32gb. I believe it can also work with Precision 7680/7780 since it is stated that these have the same compatibility with XMP memories in relation to the Alienware mentioned. Intel® XMP 3.0: Memory Profiles for Intel® Core™ Processors Just testing to be sure!

I believe there may be problems with webcam and fingerprint sensor...

@Aaron44126 Is the Precision 7540 motherboard compatible with Precision 7530?

You are right! The image is of the M2F8R, but the model for sale is the RX1Y7 which is for the RTX 3000 and has a different appearance, both in the shape of the heatpipes and in the position of the screws. Thank you!

The image of the RX1Y7 appears to have the screws in exactly the same position as the M2F8R. https://www.ebay.com/itm/195934322011

Could anyone tell me if the heatsink assembly for Precision 7540 model M2F8R (RTX 4000/5000) is exactly the same as the RX1Y7 model for Precision 7530? Even the fan specs are the same?

Precision 5680 review: https://www.notebookcheck.net/Dell-Precision-5680-review-Ada-Lovelace-dominates-on-workstations.741263.0.html

is the temperature difference between the cores still large under full load? Wait some time for the system can run a few heating/cooling cycles and the pad can adapt to different pressure levels due to uneven contact.

Certainly! As soon as I saw your results with the PTM 7950 I knew something was wrong.

Exactly! You have 4 hot P-cores (P1/P3/P5/P7) and 8 hot E-cores. One side of your chip has little contact with the heatsink. You must do the repaste again. Carefully go down the heatsink with each screw in line with its respective hole, tighten each screw in correct order a half turn at a time until all are secure.

You checked? Perhaps the contact between the heatsink and the CPU is bad. The gain in thermal headroom with PTM 7950 should be much higher...

Are these data with PTM 7950? Was the laptop on a stand or directly on the table? Room temperature too high? Was the application done well? Did you check the temperature difference between the cores? Check the P-cores and E-cores separately. If everything is ok the difference between the hottest and the least hot core under full load should be 5 to 7ºC, differentiating the P-cores from the E-cores. I'm questioning because sustaining 77W at ~90ºC is a disappointing result, especially if you're using PTM 7950. With the phase change pad my 7540 sustains 100W at 92-95ºC depending on ambient temperature and on a stand (no fan). I can't believe that after 4 years dell has downgraded the cooling of their Precision 7000 series...

When PL1 (77W) is reached and stabilized at what temperature? Your peak power seems too low...

Precision 5680 review... the author has confirmed that the TGP for RTX 5000 Ada is also 95W.

If you disabled core isolation/virtualization and it was still blocked it maybe that restoring factory defaults in BIOS would unlock undervolt. From a certain version of the BIOS, very old, it was necessary to restore the factory defaults to unlock the undervolt. Here without editing the BIOS the undervolt works on 1.24.0. If there really is a block it must have started in BIOS 1.25.0 or 1.26.1....

I have W10 Pro 22H2 here. Maybe just need to disable core isolation and virtualization features in W11 for undervolt.