Dell Precision 7550 Mode d’emploi

Dell Precision 7550/7750

External Display Connection Guide

Regulatory Model: P93F

Regulatory Type: P93F001

February 2021

Rev. A00

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid

the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

trademarks may be trademarks of their respective owners.

Chapter 1: Before you begin.......................................................................................................... 4

Check the graphics options on your computer............................................................................................................ 4

External display connection mode................................................................................................................................... 4

Hybrid Graphics mode.................................................................................................................................................. 4

Hybrid Graphics mode with Direct Output.............................................................................................................. 5

Discrete Graphics Mode...............................................................................................................................................5

Turn off the internal display..............................................................................................................................................6

Chapter 2: Connect displays..........................................................................................................7

Supported Display................................................................................................................................................................7

Connecting multiple displays with Dell Docking Station—WD19DC ...................................................................... 8

Chapter 3: Troubleshooting...........................................................................................................9

Chapter 4: Getting help and contacting Dell.................................................................................10

Contents

Contents 3

Before you begin

You can connect up to four 4K external displays or one 5K and above display using the Thunderbolt 3 (USB Type-C), HDMI, and

Mini DisplayPort available on your Precision 7550/7750.

Total number of displays supported:

●Four 4K external displays: 4 ports (two USB Type-C, HDMI, Mini DisplayPort)

●One 5K external display:

○2 USB Type-C ports

○2 ports (one USB Type-C port, one Mini DisplayPort)

Before you begin, ensure that you:

●Check the graphics options on your computer

●Check the ports available on your external displays and decide the Mode of connection.

Check the graphics options on your computer

The number of external displays supported depends on the type of graphics card available on your computer:

●The integrated graphics card can support a maximum of 3 displays

●The discrete graphics card can support a maximum of 4 displays

NOTE:

●Dell Docking Station—WD19DC display behavior follows the host the Thunderbolt 3 (USB Type-C) port

●The HDMI 2.0 port and MFDC (MFDP) Type-C port on the WD19DC docking station cannot support dual monitors

simultaneously

For more information on the graphics card available on your computer, run Dell SupportAssist on your computer, or scan your

hardware at www.dell.com/support.

The following are the graphic options that may be installed in your computer:

●Intel UHD Graphics 630 (Integrated graphics)

●NVIDIA Quadro T1000 (Discrete graphics)

●NVIDIA Quadro T2000 (Discrete graphics available only on Precision 7550 only)

●NVIDIA Quadro RTX3000 (Discrete graphics)

●NVIDIA Quadro RTX4000 (Discrete graphics)

●NVIDIA Quadro RTX5000 (Discrete graphics)

External display connection mode

External display connection mode selected in the BIOS defines the number of displays supported by the computer.

NOTE: External display connection mode is not applicable on the integrated graphic card only configuration.

External display connection modes are:

●Hybrid Graphics mode

●Hybrid Graphics mode with Direct Output

●Discrete Graphics mode

Hybrid Graphics mode

To enable Hybrid Graphics mode in the computer's BIOS:

1. Restart the system and immediately press <F2> to enter the BIOS.

4 Before you begin

2. On the BIOS screen, select Video.

3. Select Switchable Graphics.

4. Select Enable Switchable Graphics.

5. Save changes and exit the computer's BIOS.

For more information about accessing and configuring the BIOS, see the computer's Service Manual at www.dell.com/support.

Table 1. Hybrid Graphics mode

Graphic card type Supported ports

Discrete GPU ●HDMI

●Mini DisplayPort

Integradted GPU ●USB Type-C

●USB Type-C

●Laptop display

Hybrid Graphics mode with Direct Output

To enable Hybrid Graphics mode with Direct Output in the computer's BIOS:

1. Restart the system and immediately press <F2> to enter the BIOS.

2. On the BIOS screen, select Video.

3. Select Switchable Graphics.

4. Select Enable Switchable Graphics.

5. Select Discrete Graphics Controller Direct Output Mode.

6. Save changes and exit the computer's BIOS

For more information about accessing and configuring the BIOS, see the computer's Service Manual at www.dell.com/support.

Table 2. Hybrid Graphics mode with Direct Output

Graphic card type Supported ports

Discrete GPU ●HDMI

●Mini DisplayPort

●USB Type-C

Integrated GPU Laptop display

Discrete Graphics Mode

To enable Discrete Mode in the computer's BIOS:

1. Restart the system and immediately press <F2> to enter the BIOS.

2. On the BIOS screen, select Video.

3. Select Switchable Graphics.

4. Uncheck Enable Switchable Graphics.

5. Save changes and exit the computer's BIOS

For more information about accessing and configuring the BIOS, see the computer's Service Manual at www.dell.com/support.

Table 3. Discrete Graphics mode

Graphic card type Supported ports

Discrete GPU ●HDMI

●Mini DisplayPort

●USB Type-C

●Laptop display

Before you begin 5

Turn off the internal display

There may be instances where you may want to turn off the computer's internal display to connect more external displays.

You can turn off the LCD display of your computer by using the Intel HD Graphics Command Center.

To turn off the display:

1. In the Windows search bar, type Intel Graphics Command Center and press <Enter>.

2. Accept the Intel Graphics Command Center software licence agreement.

3. On the Intel Graphics Command Center window, click Display. The list of active displays is listed under the Connected

Displays section.

4. Click the ellipsis (...) in the top-right corner of your primary display, then click Extend > Display 2.

5. Click the ellipsis (...) in the top-right corner of display 2, then click Make Display Primary.

6. Click the ellipsis (...) in the top-right corner of your computer's display, then click Disable.

6 Before you begin

Connect displays

Depending on the connectors available on your external display, you can connect the displays to the Thunderbolt 3 (USB

Type-C) ports, HDMI port, Mini DisplayPort on your computer using:

●Thunderbolt 3 cables, adapters or docking stations

●USB Type-C cables. adapters or docking stations

●HDMI cables or adapters

●Mini DisplayPort cables or adapters

NOTE: To experience the full resolution supported by your external displays, use appropriate cables. For examples, use

DisplayPort or HDMI cables for 4K and above resolution.

Supported Display

Graphics card Switchable Graphics Discrete Graphics

Controller Direct

Output Mode

Supported external

displays with

computer internal

display on

Supported displays

with computer

internal display off

Intel UHD Graphics 630

- Integrated graphics

Not Applicable Not Applicable 2 3

NVIDIA Quadro T1000/

T2000/RTX 3000/RTX

4000/RTX 5000/ Intel

UHD Graphics 630

Enabled Disabled 4 ●5 displays with

docking station

●4 displays without

the docking station

(two USB Type-

C, HDMI, Mini

DisplayPort)

NVIDIA Quadro T1000/

T2000/RTX 3000/RTX

4000/RTX 5000/ Intel

UHD Graphics 630

Enabled Enabled 4 4

NVIDIA Quadro T1000/

T2000/RTX 3000/RTX

4000/RTX 5000

Disabled Disabled 3 4

Connect displays 7

Connecting multiple displays with Dell Docking

Station—WD19DC

5 external displays example with the computer display off

8 Connect displays

Troubleshooting

Question

When I connect an 8K display using the USB Type-C to DisplayPort adapter, the monitor resolution is 4k.

Cause

This may be because of incorrect settings in the BIOS.

Workaround

Ensure BIOS setting is special graphics mode or discrete graphics mode.

For more information about accessing and configuring the BIOS, see the computer's Service Manual at www.dell.com/support.

Question

When I connect an 8K display using the USB Type-C to DisplayPort adapter, the display resolution can reach to 8K, but refresh

rate cannot reach to 60Hz.

Workaround

Connect the 8K display with the dual USB Type-C to DisplayPort adapter or one USB Type-C to DisplayPort adapter + one Mini

DisplayPort.

Connect the 8K display with dual cable WD19DC dock dual DisplayPort or Host dual USB Type-C to DisplayPort adapter or Host

DisplayPort adapter + one Mini DisplayPort.

Troubleshooting 9

Getting help and contacting Dell

Self-help resources

You can get information and help on Dell products and services using these self-help resources:

Table 4. Self-help resources

Self-help resources Resource location

Information about Dell products and services www.dell.com

My Dell

Tips

Contact Support In Windows search, type Contact Support, and press

Enter.

Online help for operating system www.dell.com/support/windows

www.dell.com/support/linux

Troubleshooting information, user manuals, setup instructions,

product specifications, technical help blogs, drivers, software

updates, and so on.

www.dell.com/support

Dell knowledge base articles for a variety of computer

concerns.

1. Go to https://www.dell.com/support/home/?

app=knowledgebase.

2. Type the subject or keyword in the Search box.

3. Click Search to retrieve the related articles.

Learn and know the following information about your product:

●Product specifications

●Operating system

●Setting up and using your product

●Data backup

●Troubleshooting and diagnostics

●Factory and system restore

●BIOS information

See Me and My Dell at www.dell.com/support/manuals.

To locate the Me and My Dell relevant to your product,

identify your product through one of the following:

●Select Detect Product.

●Locate your product through the drop-down menu under

View Products.

●Enter the Service Tag number or Product ID in the

search bar.

Contacting Dell

To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell.

NOTE: Availability varies by country and product, and some services may not be available in your country.

NOTE: If you do not have an active internet connection, you can find contact information on your purchase invoice, packing

slip, bill, or Dell product catalog.

10 Getting help and contacting Dell

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