An HDMI-source to DisplayPort-display path needs a converter designed for that direction; example products use active conversion and auxiliary USB power.
Also calledHDMI to DPHDMI DisplayPort converter
A DP-to-HDMI adapter is not the reverse product.
The useful distinction
Trace the source and display labels before ordering. Auxiliary power is a separate connection and does not make the video signal bidirectional.
Existing evidence:C043A · C045A · C055A/ source records S035 · S036. See each source record for its inspection date and scope; graphic interpretation remains pending independent technical and publication review.
The useful distinction
Understand the requirement.
An HDMI-source to DisplayPort-display path needs a converter designed for that direction; example products use active conversion and auxiliary USB power. [C045A]
128-HDMI-DISPLAYPORT is explicitly one-way from an HDMI source to a DisplayPort display. Its attached USB-A lead is described for power, and the power table specifies 5 V DC. [C045B]
128-HDMI-DISPLAYPORT lists 3840 x 2160 at 60 Hz; its notes require both source and display to support that resolution and refresh rate. [C045C]
Plugable distinguishes one-way DisplayPort-source to HDMI-display cables from active HDMI-source to DisplayPort-display converters; a typical DP-to-HDMI cable is not a reversible HDMI-to-DP solution. [C045D]
Bounded facts, visible unknowns
Specifications and limits
HDMI to DisplayPort: active adapter class facts and limitations
128-HDMI-DISPLAYPORT — Active; 3840 × 2160 at 60 Hz [C045B][C045C]
Adapter direction
For HDMI source→DP display, verify an explicitly directional active converter; reverse use of a DP→HDMI cable is not supported by category. [C045D]
Verified device list
Not included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.
This is a scoped requirements guide, not an interoperability certification. It does not test hardware, calculate an arbitrary display timing, or replace the exact product documentation. A missing capability stays unknown.
Before you connect
What to check
Confirm HDMI input and DisplayPort output on the converter.
Supply required power exactly as the converter manufacturer specifies.
Check the converter and both endpoints for the complete requested video mode.
Record the exact adapter model and documented input/output before treating the two connector ends as a usable path.
128-HDMI-DISPLAYPORT: HDMI output → DisplayPort input. An HDMI video source; use the exact requested mode at both endpoints. Manufacturer explicitly says one-way HDMI source to DisplayPort display.
Source-scoped mode, not a system guarantee
3840 × 2160 at 60 Hz. Both endpoints must support the stated resolution and refresh rate. Feature combinations still need checking. Compare all three documented examples in the Display adapter direction field reference.
AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.
C045ASource checked · pending review
An HDMI-source to DisplayPort-display path needs a converter designed for that direction; example products use active conversion and auxiliary USB power.
Locator: PDF p. 1: USB-A power lead; p. 2: explicit one-way HDMI-source to DisplayPort-display conversion and Hardware table, visually inspected. Access: public pdf text. Exact 128-HDMI-DISPLAYPORT example only. The attached USB lead is for converter power in the scoped description; no USB data path is inferred. Power and supported modes remain product-specific, without a universal compatibility verdict.
Claim scope: Consumer identification / documented standard or product class only. Next review due 2026-12-30.
C045BSource checked · pending review
128-HDMI-DISPLAYPORT is explicitly one-way from an HDMI source to a DisplayPort display. Its attached USB-A lead is described for power, and the power table specifies 5 V DC.
Locator: PDF p. 1: USB-A power lead; p. 2: explicit one-way HDMI-source to DisplayPort-display conversion and Hardware table, visually inspected. Access: public pdf text. Exact 128-HDMI-DISPLAYPORT example only. The attached USB lead is for converter power in the scoped description; no USB data path is inferred. Power and supported modes remain product-specific, without a universal compatibility verdict.
Claim scope: Exact 128-HDMI-DISPLAYPORT. USB connector-type metadata does not establish a USB video-data transport; no generic power demand or charging function inferred.. Next review due 2027-01-11.
C045CSource checked · pending review
128-HDMI-DISPLAYPORT lists 3840 x 2160 at 60 Hz; its notes require both source and display to support that resolution and refresh rate.
Locator: PDF p. 1: USB-A power lead; p. 2: explicit one-way HDMI-source to DisplayPort-display conversion and Hardware table, visually inspected. Access: public pdf text. Exact 128-HDMI-DISPLAYPORT example only. The attached USB lead is for converter power in the scoped description; no USB data path is inferred. Power and supported modes remain product-specific, without a universal compatibility verdict.
Claim scope: Exact-model stated mode, not independent measured performance, unrestricted HDR/color-mode support or a guarantee for a chain of converters.. Next review due 2027-01-11.
C045DSource checked · pending review
Plugable distinguishes one-way DisplayPort-source to HDMI-display cables from active HDMI-source to DisplayPort-display converters; a typical DP-to-HDMI cable is not a reversible HDMI-to-DP solution.
Locator: What typically works and what does not; DP source to HDMI / HDMI source to DP rows; last update 20 Aug 2026 Access: public page. The named categories and examples are explanations, not compliance tests of other manufacturers, specific devices or every cable.
Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Manufacturer explicitly says one-way HDMI source to DisplayPort display.
Source requirement
An HDMI video source; use the exact requested mode at both endpoints.
Separate power check
Attached USB-A power lead; manufacturer specifies 5 V DC. Follow the exact accessory instructions, not a guessed power requirement.
Stated display mode
3840 × 2160 at 60 Hz Both endpoints must support the stated resolution and refresh rate. Feature combinations still need checking.
Evidence and exact scope
An HDMI-source to DisplayPort-display path needs a converter designed for that direction; example products use active conversion and auxiliary USB power. C045A
Consumer identification / documented standard or product class only
128-HDMI-DISPLAYPORT is explicitly one-way from an HDMI source to a DisplayPort display. Its attached USB-A lead is described for power, and the power table specifies 5 V DC. C045B
Exact 128-HDMI-DISPLAYPORT. USB connector-type metadata does not establish a USB video-data transport; no generic power demand or charging function inferred.
Assessment 2026-10-22 · earliest scheduled source review 2027-01-05. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.
Scoped support: Scoped active HDMI-source to DisplayPort-display example.
Not established / limitations: Exact 128-HDMI-DISPLAYPORT example only. The attached USB lead is for converter power in the scoped description; no USB data path is inferred. Power and supported modes remain product-specific, without a universal compatibility verdict.
Locator: PDF p. 1: USB-A power lead; p. 2: explicit one-way HDMI-source to DisplayPort-display conversion and Hardware table, visually inspected.
Scoped support: General manufacturer explanation of cable directionality and active converter categories, not product-specific endorsement
Not established / limitations: The named categories and examples are explanations, not compliance tests of other manufacturers, specific devices or every cable.
Locator: What typically works and what does not; DP source to HDMI / HDMI source to DP rows; last update 20 Aug 2026
Trace 4 claims to their source records
C045A · P045
An HDMI-source to DisplayPort-display path needs a converter designed for that direction; example products use active conversion and auxiliary USB power.
Claim scope: Consumer identification / documented standard or product class only
128-HDMI-DISPLAYPORT is explicitly one-way from an HDMI source to a DisplayPort display. Its attached USB-A lead is described for power, and the power table specifies 5 V DC.
Claim scope: Exact 128-HDMI-DISPLAYPORT. USB connector-type metadata does not establish a USB video-data transport; no generic power demand or charging function inferred.
128-HDMI-DISPLAYPORT lists 3840 x 2160 at 60 Hz; its notes require both source and display to support that resolution and refresh rate.
Claim scope: Exact-model stated mode, not independent measured performance, unrestricted HDR/color-mode support or a guarantee for a chain of converters.
Plugable distinguishes one-way DisplayPort-source to HDMI-display cables from active HDMI-source to DisplayPort-display converters; a typical DP-to-HDMI cable is not a reversible HDMI-to-DP solution.
Claim scope: General converter direction classification; no exact-model compatibility verdict
Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.
Source-qualified next step · P045
Will a DisplayPort-to-HDMI cable work backwards?
What the evidence saysDo not reverse a typically one-way DP-source to HDMI-display cable. HDMI-source to DP-display conversion calls for an explicitly HDMI-to-DP active product.
What is still unknown
“Active” alone does not establish the required product model, power, bandwidth or monitor support.
Check before proceeding
Label the source output and display input separately.
Confirm the converter explicitly says HDMI source → DisplayPort display.
Check auxiliary power and supported output mode in the exact converter instructions.
C045D / source-linked claim: Plugable distinguishes one-way DisplayPort-source to HDMI-display cables from active HDMI-source to DisplayPort-display converters; a typical DP-to-HDMI cable is not a reversible HDMI-to-DP solution.
