Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

ThinkPad NotebooksThinkPad: P and W Series Mobile Workstations
All Forum Topics
Options

244 Posts

10-21-2012

Switzerland

292 Signins

1760 Page Views

  • Posts: 244
  • Registered: ‎10-21-2012
  • Location: Switzerland
  • Views: 1760
  • Message 1 of 4

10-bit workflow on w540?

2013-11-05, 12:54 PM

This is a make-or-break question for a workstation machine: Can the w540 output 10-bit color (adobeRGB, video, photo, rendering) over its TB port?

 

The silence from Lenovo and Nvidia suggests NO, despite Quadro's internal capability - possibly still gated by the Optimus/Intel IGP. (BTW: Galaxy S4 recently got an award for its adobeRGB coverage... a phone)

 

Internally, w540's IPS panel; externally, the Quadro over DP/TB; both are natural matches for a 10b flow - unless the Intel/IGP side of the Optimus would limit Quadro's 32b color packing out of the IGP video buffer...

But then one can not claim WS-class and ISV if true 10b rendering is impossible with Optimus! 

 

The latter sad assumption seems to be indeed the case for Intel's HD4000 'Optimus'; see tijo's post in http://forum.notebookreview.com/dell-latitude-vostro-precision/733144-m4700-nvidia-quadro-intel-hd40...

 

Net: If the w540 can NOT drive my 10b monitors over DP/TB, this is a deal breaker. Hard to believe that Optimus w/ the latest Intel IGP still can't output 10b color in AD2013 - and reason to avoid Optimus/IGP, if true.

 

However, i hope i'm wrong and that the w540 supports 10b workflows.

 

Mitch

Reply
Options

664 Posts

10-21-2011

Germany

9453 Signins

100357 Page Views

  • Posts: 664
  • Registered: ‎10-21-2011
  • Location: Germany
  • Views: 100357
  • Message 2 of 4

Betreff: 10-bit workflow on w540?

2013-11-05, 15:56 PM

More details on the W540 Thunderbolt port and the W540 display topology:

W540-Topology.PNG Thunderbolt-W540.PNG

Now, as you can see there, the W540 has two display-modes, that can be changed in the BIOS: Standard and Advanced. In Standard-Mode, all dsplay connections are handled by the Intel HD 4600. In Advanced Mode, alll display connections on the Dock are handled by the Quadro K1100M / K2100M. Since all W540 versions have Optimus, the internal screen has to be 6-bit, since the HD 4600 sill can´t drive 10bit displays. But an external 10 bit monitor connected over the dock with an W540 in Advanced mode should work.

 

Not sure about the internal ports of the Notebook. We will see if it will work or not.

Reply
Options

244 Posts

10-21-2012

Switzerland

292 Signins

1760 Page Views

  • Posts: 244
  • Registered: ‎10-21-2012
  • Location: Switzerland
  • Views: 1760
  • Message 3 of 4

Betreff: 10-bit workflow on w540?

2013-11-05, 17:11 PM
Thanks for the info, it's quite relevant!
The still open issue is the video buffer R/W architecture (i used to design such things), which remains
(a) the final stage before video pkts are sent over TB/DP;
(b) controlled by Intel (that's when Nvidia lost the game).

Both GPUs working in parallel is fine. Yet Nividia's silence about its Quadro passing 10b color from a video buffer shared w/ Intel doesn't look good. And Lenovo also keeps quiet, in stead of claiming this quite critical workflow as supported.
Reply
Options

584 Posts

11-04-2010

Canada

811 Signins

5452 Page Views

  • Posts: 584
  • Registered: ‎11-04-2010
  • Location: Canada
  • Views: 5452
  • Message 4 of 4

Betreff: 10-bit workflow on w540?

2013-11-06, 4:16 AM

Experience with the W510 and W520 tells me that if something (a specification) is not stated by Lenovo, it's best to assume it's not there than to be hopeful.

 

If you "know" of another portable workstation that can do what you want, and Lenovo isn't clear about the W540's capability, it's best to go with the known fact(s).

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms