Dell Precision 7540 and 7740 Owner's Thread

Does anyone here happen to know if these models support output via the Intel GPU if the bios "Discrete Graphics Controller Direct Output Mode" option is disabled? A sales rep told me that the 7740 can only output via the discrete GPU if one is present. It would be great if it could do this so it could work under Linux driving external displays without needing the Nvidia or AMD driver installed.

 

The sales rep is wrong. Id "discrete graphics output mode" is off, it will output from the Intel GPU, unless you connect more than two displays (Intel GPU can only drive three including the internal one). The whole point of that option in the BIOS is to toggle output from the Intel GPU or the dGPU.

 

Ah, that makes more sense. He also said that the Intel GPU didn't output to USB-C / Thunderbolt 3 at all when you didn't have a discrete GPU installed. The "Setup and Specifications" doc seemed to confirm this (only eDP/mDP/HDMI are listed under UHD630) although it seemed to be a step backwards from the 7730.

Are there any performance numbers on the Quadro RTX 4000? I am guessing it should perform around a MaxP RTX 2070 based on the spec sheet. It's a shame AMD didn't make a mobile WX9100 variant. I am guessing the WX7130 is probably behind the Quadro RTX 3000 in performance, even with 30% higher TDP...

 

That's crazy too. The new WD series docks documentation specifically mention that they can be used without a dGPU, albeit the available options for output resolution/refresh rate will be more limited.

 

I'v got a question regarding mentioned M.2 NVMe's
In the specificationsguide it says up to 512 GB and up to 2TB. ?? Which one is right?
https://www.dell.com/support/manual...b831a0-7a84-4b58-a94e-626aee942daf&lang=en-us

Thank you for an answer.

- still waiting for my 7740..... (Just got shipping info)

 

You can definitely install 2 TB NVMe drives.
(It is very very very likely that higher capacity drives will also work once they become available.)

 

and what is that 512GB info for?

maybe 512 is minimum?

Thx.

 

This is really strange.
Your same exact panel model AU Optronics B173HAN01.3 [AUO139D] was also on this 7730 unit:
http://forum.notebookreview.com/thr...0-owners-thread.820539/page-163#post-10835786
where it's clearly reported "6bits per Primary Color"

The only differences are "Dell P/N" and "Date of manufacture":

Dell 7730:
[DELL P/N 257DG]
Date of manufacture: Week:10, Year:2018

Dell 7740:
[DELL P/N 6HK8X]
Date of manufacture: Week:5, Year:2019

I think that different Dell part number is due to different model (7730 vs 7740) even though it's the same display.

But i don't think that 2019 version has better color depth (8bit vs 6bit).
Auo should have created a new panel model for the purpose, i think.

 

Does anyone know if their is some app to lower brightness of the screen below what windows lets you do? The 4k screen looks to me way too bright on lowest settings with dim to no lights

 

The Intel Graphics Control Panel has a brightness slider on the display settings page which you can use on top of the Windows brightness setting.

Works for my system with Intel GPU only, not sure if there is a difference if you have a dGPU.