Precision 7770 External Display Connection Guide Regulatory Model: P115F Regulatory Type: P115F001 July 2022 Rev.
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. © 2022 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Contents Chapter 1: Before you begin.......................................................................................................... 4 Check the graphics options on your computer............................................................................................................ 4 External display connection mode................................................................................................................................... 4 UMA Graphics mode..............................
1 Before you begin You can connect up to two 4K external displays or one 8K and above display using the two Thunderbolt 4 on your Precision 7770. Total number of displays supported: ● Two 4K external displays: 2 ports (Thunderbolt 4) ● One 8K 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.
UMA Graphics mode Table 1. UMA Graphics mode Graphic card type Supported ports Integrated GPU ● ● ● ● HDMI USB-C (non-Thunderbolt 4) Two Thunderbolt 4 Laptop display Hybrid Graphics mode To enable Hybrid Graphics mode in the computer's BIOS: 1. Restart the system and immediately press to enter the BIOS. 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.
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 4.
2 Connect displays Depending on the connectors available on your external display, you can connect the displays to the Thunderbolt 4 (USB Type-C) ports, HDMI port, Mini DisplayPort on your computer using: ● Thunderbolt 4 cables, adapters or docking stations ● USB Type-C cables. adapters or docking stations ● HDMI 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.
*When connecting via docking station, additional external displays can be connected under Hybrid mode (with Internal Display Off). NOTE: Discrete mode and UMA modes are disabled when additional external displays are connected via docking station. Table 6.
3 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.
4 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 8. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app Tips Contact Support In Windows search, type Contact Support, and press Enter. Online help for operating system www.dell.
