Plugable UD-3900PDZ vs Plugable UD-3900 (dual-HDMI revision)
Which dock fits the laptop’s video capabilities, permitted display software and charging setup?
Products compared
ASIN B08DDH5CPW
Plugable UD-3900PDZ
You need the additional native HDMI path and your laptop supports DisplayPort Alt Mode.
Last observed offer
$169.99
- Confirm offer eligibility on Amazon
Size: 7.9 x 3.3 x 1.2 inches
Price checked
Observed condition: new. Coupon and subscription requirements unverified.
ASIN B00ECDM78E
Plugable UD-3900 (dual-HDMI revision)
You need two supported HDMI outputs from a USB-A host and can use DisplayLink.
Last observed offer
$99.95
- Confirm offer eligibility on Amazon
Size: Dual Display
Price checked
Observed condition: new. Coupon and subscription requirements unverified.
Prices are per listed package. Pickoryx may earn a commission from qualifying purchases through the paid Amazon links on this page, at no added cost to you.
Published by Pickoryx · Published 2026-10-13 · Source checked 2026-10-13 05:02 UTC
The main trade-off
PDZ adds a host-dependent native video route and conditional USB-C charging; UD-3900 supports a USB-A or USB-C data connection but keeps laptop power separate.
Quick verdict
Choose the UD-3900PDZ when its native HDMI route or USB-C charging solves a real desk requirement. Choose the dual-HDMI UD-3900 for a supported two-monitor setup over USB-A or USB-C while keeping the laptop charger. Both use DisplayLink for some or all displays, so confirm software permission before buying.
Choose Plugable UD-3900PDZ if
- You need the additional native HDMI path and your laptop supports DisplayPort Alt Mode.
- You want charging through the dock and have verified the actual unit’s wattage against your laptop.
Choose Plugable UD-3900 (dual-HDMI revision) if
- You need two supported HDMI outputs from a USB-A host and can use DisplayLink.
- You will keep the laptop’s own charger and do not need PDZ’s native output.
When the recommendation changes
- The laptop lacks Alt Mode, does not accept USB-C charging, or needs more power than the particular PDZ unit supplies.
- Your employer prohibits DisplayLink installation; neither provides a driverless two-monitor setup through its dock outputs.
The differences that matter
| Decision point | Plugable UD-3900PDZ | Plugable UD-3900 (dual-HDMI revision) |
|---|---|---|
| Display Routing And Host Prerequisites | HDMI1 uses DisplayPort Alt Mode from the host. HDMI2/3 use DisplayLink USB graphics and its software.[1] | Both HDMI outputs use DisplayLink. The supplied host cable supports USB-A or USB-C.[2] |
What this changes: For a Windows desk, check software permission first, then the host video port. PDZ retains one native HDMI route on an Alt-Mode host without DisplayLink; it does not become a driverless multi-monitor dock.[1, 3, 2] The better fit depends on your priorities | ||
| Laptop Charging Connection | USB-C Power Delivery can charge an eligible laptop; the actual unit may be the 60W or 100W revision. Check its label and the laptop’s input requirements.[4, 3] | Does not charge the host, including when connected by USB-C. Keep the laptop’s separate charger connected.[2] |
What this changes: PDZ can remove the separate laptop charging connection when the host and delivered power fit. UD-3900 fits a desk where keeping that charger is acceptable.[4, 3, 2] The better fit depends on your priorities | ||
Best for your routine
USB-A Windows laptop, two supported HDMI monitors and an existing charger
Best fit: Plugable UD-3900 (dual-HDMI revision)
Based on listed features, not comparative testing.
The UD-3900 provides the matching host connection and display setup; allow DisplayLink installation.
A compatible USB-C laptop whose desk should use one host cable for data and charging
Best fit: Plugable UD-3900PDZ
Based on listed features, not comparative testing.
PDZ offers host charging, subject to the laptop accepting its negotiated power and the unit’s confirmed revision.
One native HDMI display is needed when DisplayLink cannot be installed
Best fit: Plugable UD-3900PDZ
Based on listed features, not comparative testing.
PDZ’s HDMI1 uses the laptop’s Alt-Mode signal. Confirm that host capability; HDMI2/3 remain unavailable without DisplayLink.
Value and trade-offs
One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.
If PDZ costs more, justify the difference with a usable native display route or a charging connection it can actually replace.
There is insufficient price history here for a purchase-timing recommendation.
Limitations
- This is a Windows productivity setup comparison, not a measured performance or reliability test. Confirm support for the exact laptop, Windows release and planned monitor modes.
- The UD-3900PDZ is not a three-4K dock. Its outputs have different capabilities.
- An advertised 100W model name does not prove the shipped PDZ unit’s revision; inspect the rear USB-C label or box.
Questions shoppers ask
What should I check before ordering?
Confirm IT permits DisplayLink, identify whether the laptop has Alt Mode, and map each monitor’s resolution and refresh rate to the intended port. Separately check whether USB-C charging is accepted at the dock’s actual rating.
Can I use an older UD-3900 review to identify the connectors?
Only after checking the revision. Older UD-3900 units have HDMI plus DVI; the version compared here has two HDMI outputs. Photos of the rear panel resolve that difference.
Methodology and sources
We separated monitor signal prerequisites from the independent question of whether the dock can replace the laptop’s charging connection.
AI assisted research and writing. Pickoryx did not test either dock hands-on.
View 4 sources
- 1.What technology drives each of the displays outputs within the UD-3900PDZ?Plugable · Official specifications · Source checked 2026-10-13 05:01 UTC
Evidence used on this page
- Article3210757, paragraphs on HDMI1, HDMI2/3 and USB-C Alt Mode (lines65–69): HDMI1 uses host Alt Mode; the other outputs use DisplayLink software.
- 2.Plugable Universal Dual Monitor Docking Station, TAA Compliant - UD-3900Plugable · Official specifications · Source checked 2026-10-13 05:02 UTC
Evidence used on this page
- Features and Video tables; charging FAQ; revision FAQ lines427–431: Current dual-HDMI display paths use DisplayLink; host can connect over USB-A or USB-C; laptop charging is separate. Older units have HDMI and DVI.
- 3.Plugable USB-C Triple Monitor Docking Station, 100W Laptop ChargingPlugable · Official specifications · Source checked 2026-10-13 05:01 UTC
Evidence used on this page
- Tech Specs; software FAQ; Windows minimum system requirements; Power table: USB-C host power and hybrid video operation; Windows DisplayLink software requirements. Generic wrong-model support blocks excluded.
- 4.Did I get the wrong version of the UD-3900PDZ? 60W vs. 100W chargingPlugable · Official specifications · Source checked 2026-10-13 05:02 UTC
Evidence used on this page
- Article3193420, version differences and How do I tell which version I have? lines65–90: 60W and100W units share the model; identify the version on rear USB-C label or box. Host negotiates charging power.