This workstation is not a generic one-cable USB-C case. Dell's matrix lists WD19DC/WD19DCS, while its current WD25 and other older dock rows are marked unsupported for Precision 7770.
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Laptop · Matrix dated 12 March 2026; reviewed 8 September 2026 · Documentation-based, not hands-on testing
WD19DC or WD19DCS is the only dock family Dell marks supported for Precision 7770 in the reviewed matrix. Use its dual USB-C host connector; Dell's exact display guide also describes a dual-cable WD19DCS path. The laptop itself shipped with 180 W or 240 W barrel adapters: a 240 W configuration exceeds the dock family's published up-to-210 W host delivery, so retain the original barrel charger for full-power operation. Do not substitute a listed-but-unsupported WD25, WD22TB4, WD19S, WD19TB, UD22 or HD22Q merely because its plug fits.
It is the only dock family marked supported in the reviewed Dell compatibility row, and Dell's exact display guide references the WD19DCS dual-cable route.
Check first: Use the dock's specified dual host connector and AC supply. A 240 W Precision configuration can exceed the dock's up-to-210 W host delivery.
Dell's Precision 7770 specifications list both barrel-adapter configurations, so the shipped adapter identifies the real workstation power requirement.
Check first: For a 240 W system, use the supported barrel charger when full performance matters. Do not infer that matrix compatibility means the dock replaces every charger.
Dell marks these other current and previous dock families unsupported for the exact Precision 7770 row.
Check first: A Thunderbolt or USB-C port match is not compatibility evidence. Leave another dock unrecommended unless Dell adds exact-model support.
Still unknown: Dell's documents do not establish every GPU mode, combined dock output, high-refresh/HDR result or sustained workstation load through WD19DC/DCS. The installed GPU, graphics mode, dock supply, firmware and monitor cables remain material.
Compare documented options · Check screens and power
Applies only to Dell Precision 7770. Dell's Setup and Specifications was updated 15 August 2024, its External Display Connection Guide is dated 6 July 2022, and the dock decision uses Dell's March 2026 compatibility matrix. Manufacturer documentation is not a field-performance test. Sources reviewed 18 September 2026. Manufacturer documentation is not a Connect Your Dock hardware test.
“Supported” is Dell’s model-level entry. The screen resolution, cabling and delivered charging power still need to match your desk. Grouped dock variants share the stated matrix column.
| Dock configuration | Manufacturer status | Charging ceiling | Conditions and source |
|---|---|---|---|
| Dell Pro Dock WD25 | Not supported | Up to 100 W on supported Dell systems | Configurations needing more than 100 W may need their own charger with WD25. Select a listed higher-power dock if one-cable power is essential. Dell matrix, page 5 |
| Dell Pro Dock WD25Z / Smart Dock SD25 | Not supported | Up to 130 W on supported Dell systems | Some workstation configurations need more than 130 W. Keep the laptop’s supported charger connected; the dock alone may not sustain full performance. Dell matrix, page 5 |
| Dell WD25TB4 / SD25TB4 | Not supported | Up to 130 W on supported Dell systems | Some workstation configurations need more than 130 W. Keep the laptop’s supported charger connected; the dock alone may not sustain full performance. Dell matrix, page 5 |
| Dell WD25TB5 / SD25TB5 | Not supported | Up to 300 W; host must support the required power range | This Precision model does not support the dock’s extended power range and draws at most 130 W here. A separate laptop charger is required for optimal operation. Dell matrix, page 5 |
| Dell WD22TB4 | Not supported | Up to 130 W on supported Dell systems | Some Precision configurations exceed 130 W. Use the supported laptop charger when needed; even a 210 W dock does not cover a 280 W configuration. Dell matrix, page 14 |
| Dell WD19 / WD19S (130 W adapter) | Not supported | Up to 90 W; 130 W is the adapter rating | This configuration may exceed the dock’s charging capacity. Check the laptop’s required power and keep its supported charger available. Dell matrix, page 14 |
| Dell WD19 / WD19S (180 W adapter) | Not supported | Up to 130 W; 180 W is the adapter rating | Some Precision configurations exceed 130 W. Use the supported laptop charger when needed; even a 210 W dock does not cover a 280 W configuration. Dell matrix, page 14 |
| Dell WD19TB / WD19TBS | Not supported | Up to 130 W on supported Dell systems | Some Precision configurations exceed 130 W. Use the supported laptop charger when needed; even a 210 W dock does not cover a 280 W configuration. Dell matrix, page 14 |
| Dell WD19DC / WD19DCS | Supported | Up to 210 W with a supported dual-cable host | Confirm monitor modes and the device’s power requirement. Dell matrix, page 14 |
| Dell Universal Dock UD22 | Not supported | Up to 96 W; check the laptop requirement | This configuration may exceed the dock’s charging capacity. Check the laptop’s required power and keep its supported charger available. Dell matrix, page 14 |
| Dell Dual Charge Dock HD22Q | Not supported | Up to 90 W to the host | This configuration may exceed the dock’s charging capacity. Check the laptop’s required power and keep its supported charger available. Dell matrix, page 14 |
German source labels are translated as supported or not supported. A negative mark remains negative even when a footnote describes a power limitation. Missing entries are shown separately.
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