Dell Precision 7540 and 7740 Owner's Thread

You might also be interested in this post from @SlurpJug, he has been trying a few different pastes in the 7550.
http://forum.notebookreview.com/thr...50-owners-thread.833097/page-19#post-11027228

 

https://www.dell.com/en-uk/shop/dell-performance-dock-wd19dc/apd/210-arje/pc-accessories

Anyone got one of those?

Says it delivers 210W, but the power brick for my 7740 delivers 240W. Does that mean the PC won't run at full power when using the docking station?

Thanks

 

This has come up before. I haven't seen any detailed performance measurements of docked vs undocked (that would be interesting) but you do have to take into account AC/DC conversion loss here. The power brick draws up to 240W AC from the wall but it delivers less than that to the PC. The dock (supposedly) delivers up to 210W of DC power to the PC. It should be pretty close to the same. The dock comes with a 240W power brick.

 

Hhhmm, yeah I did wonder about that. The output on the power brick is also 240W though (19.5 V x 12.3 A) - but maybe the PC downstream of the internal power circuitry also receives 210W (equivalent to the USB-C ports receiving 210W from the docking station)...

Something like this:

 

Dell have now told me that for optimum performance, both the docking station and the power cable need to be plugged into the laptop at the same time. So two power bricks in total used at the same time.

 

Dock supplies maximum 130W per TB3.
I'm also planing to use Kryonaut (or Conductonaut). If pads are not necessary that's good.
I wonder if getting 7550 with i7-10875 instead of 7540 i9-9980HK would be beneficial for thermals during long workloads, but I've heard that 7550 while having better cooling, is much less sturdy than previous generation. Can anyone confirm or deny?

 

Dell has docks like the WD19DC that use two USB-C / Thunderbolt 3 ports to deliver 210 watts.

 

TB18DC and WD19DC docks use both Thunderbolt/USB-C ports and can deliver 210W of power.
[Edit] Ninja'd

 

Hi,

I’ve just received my precision 7540 (9980H, nvidia quadro RTX3000).. I’m very pleased with the build quality of this laptop. However, I’m quite concerned with the thermal throttling/fan noises under heavy load. I’ve planned to repast it and I also wanted to undervolt the cpu.
After reading the discussion on this thread, I’ve tried to reset the bios (1.9.0) with factory reset (unsuccessful), then downgrade with 1.8.2 (unsuccessful). At this point, I would like to test 1.7.0 as if I’m correctly understood, was the latest version without the plundervolt implementation. However, I cannot find 1.7.0 on dell website (older versions are prior 1.5.1, and it seems that it is not possible to flash with versions earlier than 1.5.0).
Is it still possible to find a BIOS compatible with undervolting?

 

That's why I wrote "per port". Theoretical limit is 130W for TB and 100W USB-C. So 210W is well within range.