This page publishes what sits behind the Compatibility Checker: which devices the dataset covers, what each source documents about them, where the engine can answer, and where it deliberately answers UNKNOWN. It is generated from the live dataset — the figures below are computed, not typed in.
Read this together with Methodology (how the engine reasons) and Sources & Corrections (how sources are ranked and how errors are handled).
15 of 90 evaluations return a verdict; the other 75 are UNKNOWN. That ratio is a measure of how much evidence exists, not of engine quality: an UNKNOWN means the engine did not have what it needs to answer responsibly, and it is never the same as “incompatible”. Reasons behind the UNKNOWN results: 75 × “No verified timing on file”.
| Reference mode | Evaluations | Answered | Unknown |
|---|---|---|---|
| 1920×1080 @ 60 Hz, RGB 8-bit | 30 | 5 | 25 |
| 3840×2160 @ 60 Hz, RGB 8-bit | 30 | 10 | 20 |
| 3840×2160 @ 144 Hz, RGB 10-bit | 30 | 0 | 30 |
Source documents were last retrieved on 2026-08-19. This snapshot was computed on 2026-10-17 and refreshes automatically when the dataset changes.
Every value below is a documented field from the dataset, with the source that supports it (S-numbers link to the source table). A value marked “inferred” was derived from what a source says rather than quoted from it. Anything the dataset does not know is listed under “Not documented” instead of being filled in.
Lifecycle status on file: active
Lifecycle status on file: active
Lifecycle status on file: active
Lifecycle status on file: active
Lifecycle status on file: active
Lifecycle status on file: active
| Connection | Mode | Pixel clock (MHz) | Timing standard | Source |
|---|---|---|---|---|
| DisplayPort | 1920 × 1080 @ 60 Hz | 148.5 | Dell preset display mode table, FHD 1920x1080 | [S18] |
| DisplayPort | 3840 × 2160 @ 60 Hz | 533.25 | Dell preset display mode table, UHD 3840x2160 (DP) | [S18] |
| HDMI | 1920 × 1080 @ 60 Hz | 148.5 | Dell preset display mode table, FHD 1920x1080 | [S18] |
| HDMI | 3840 × 2160 @ 60 Hz | 594 | Dell preset display mode table, UHD 3840x2160 (HDMI); matches CTA-861 VIC 97 | [S18] |
| USB-C | 1920 × 1080 @ 60 Hz | 148.5 | Dell preset display mode table, FHD 1920x1080 | [S18] |
| USB-C | 3840 × 2160 @ 60 Hz | 533.25 | Dell preset display mode table, UHD 3840x2160 (DP) | [S18] |
Lifecycle status on file: active
| Connection | Mode | Pixel clock (MHz) | Timing standard | Source |
|---|---|---|---|---|
| HDMI | 1920 × 1080 @ 60 Hz | 148.5 | CTA-861 VIC 16 | [S1] |
| HDMI | 3840 × 2160 @ 60 Hz | 594 | CTA-861 VIC 97 | [S1] |
| Connection | Mode | Pixel clock (MHz) | Timing standard | Source |
|---|---|---|---|---|
| HDMI | 1920 × 1080 @ 60 Hz | 148.5 | CTA-861 VIC 16 | [S1] |
Lifecycle status on file: discontinued
| Connection | Mode | Pixel clock (MHz) | Timing standard | Source |
|---|---|---|---|---|
| DisplayPort | 3840 × 2160 @ 60 Hz | 533.28 | CVT-RB v1 (derived from the horizontal frequency published by LG) | [S5 (inferred)] |
The engine's verdict for every dock and monitor pair at each reference mode. There is no separate page per combination: this table is the whole answer set, and the Checker evaluates any other mode on demand.
| Dock | Monitor | 1920×1080 @ 60 Hz, RGB 8-bit | 3840×2160 @ 60 Hz, RGB 8-bit | 3840×2160 @ 144 Hz, RGB 10-bit |
|---|---|---|---|---|
| CalDigit TS4 | Apple Studio Display | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| CalDigit TS4 | Dell U2723QE | Fully compatible 3.564 of 25.92 Gbps | Fully compatible 12.798 of 25.92 Gbps | Unknown No verified timing on file |
| CalDigit TS4 | Gigabyte M32U | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| CalDigit TS4 | LG 27GP950-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| CalDigit TS4 | LG 27MD5KL-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| CalDigit TS4 | LG 27UL650-W | Unknown No verified timing on file | Fully compatible 12.799 of 25.92 Gbps | Unknown No verified timing on file |
| Dell WD19S | Apple Studio Display | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD19S | Dell U2723QE | Fully compatible 3.564 of 25.92 Gbps | Fully compatible 12.798 of 25.92 Gbps | Unknown No verified timing on file |
| Dell WD19S | Gigabyte M32U | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD19S | LG 27GP950-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD19S | LG 27MD5KL-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD19S | LG 27UL650-W | Unknown No verified timing on file | Fully compatible 12.799 of 25.92 Gbps | Unknown No verified timing on file |
| Dell WD22TB4 | Apple Studio Display | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD22TB4 | Dell U2723QE | Fully compatible 3.564 of 25.92 Gbps | Fully compatible 12.798 of 25.92 Gbps | Unknown No verified timing on file |
| Dell WD22TB4 | Gigabyte M32U | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD22TB4 | LG 27GP950-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD22TB4 | LG 27MD5KL-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Dell WD22TB4 | LG 27UL650-W | Unknown No verified timing on file | Fully compatible 12.799 of 25.92 Gbps | Unknown No verified timing on file |
| HP USB-C Dock G5 | Apple Studio Display | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| HP USB-C Dock G5 | Dell U2723QE | Partially compatible 3.564 of 25.92 Gbps · Dock output version not documented (assumed) | Partially compatible 12.798 of 25.92 Gbps · Dock output version not documented (assumed) | Unknown No verified timing on file |
| HP USB-C Dock G5 | Gigabyte M32U | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| HP USB-C Dock G5 | LG 27GP950-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| HP USB-C Dock G5 | LG 27MD5KL-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| HP USB-C Dock G5 | LG 27UL650-W | Unknown No verified timing on file | Partially compatible 12.799 of 25.92 Gbps · Dock output version not documented (assumed) | Unknown No verified timing on file |
| Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) | Apple Studio Display | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) | Dell U2723QE | Fully compatible 3.564 of 25.92 Gbps | Fully compatible 12.798 of 25.92 Gbps | Unknown No verified timing on file |
| Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) | Gigabyte M32U | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) | LG 27GP950-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) | LG 27MD5KL-B | Unknown No verified timing on file | Unknown No verified timing on file | Unknown No verified timing on file |
| Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) | LG 27UL650-W | Unknown No verified timing on file | Fully compatible 12.799 of 25.92 Gbps | Unknown No verified timing on file |
The dataset holds 99 evidence rows drawn from 28 sources. Each row ties one claim (for example “Dell WD22TB4 — maximum Power Delivery”) to one source, a confidence level and whether the source states it directly or it was inferred. Confidence: 74 high, 25 medium — 99 in total. Inference is counted inside those totals, not on top of them: 9 of the medium records are inferred rather than stated directly by the source. 0 records have a recorded conflict between sources. 10 of the 99 records describe host devices, cables and GPUs that the public tools do not evaluate yet.
| Ref | Publisher | Type | Document | Supports | Retrieved |
|---|---|---|---|---|---|
| S1 | Consumer Technology Association | Standards body | CTA-861 OVT Calculator |
Gigabyte M32U — display timing LG 27GP950-B — display timing |
2026-08-19 |
| S2 | HDMI Forum | Standards body | HDMI Forum Releases Version 2.1 of the HDMI Specification |
Protocol: HDMI 2.1 — maximum bandwidth (Gbps) |
2026-08-19 |
| S3 | HDMI Forum | Standards body | HDMI Specification Technology Overview |
Protocol: HDMI 2.0 — maximum bandwidth (Gbps) |
2026-08-19 |
| S4 | USB-IF | Standards body | USB4 |
Protocol: USB4 1.0 — maximum bandwidth (Gbps) Protocol: USB4 2.0 — maximum bandwidth (Gbps) |
2026-08-19 |
| S5 | VESA | Standards body | VESA Coordinated Video Timings (CVT) Standard, Version 1.2 |
LG 27UL650-W — display timing |
2026-08-19 |
| S6 | VESA | Standards body | VESA Publishes DisplayPort Standard Version 1.4 |
Protocol: DisplayPort 1.4 — maximum bandwidth (Gbps), encoding overhead (%) |
2026-08-19 |
| S7 | VESA | Standards body | VESA Releases DisplayPort 2.1 Specification |
Protocol: DisplayPort 2.0/2.1 — maximum bandwidth (Gbps) |
2026-08-19 |
| S8 | Intel | Technology owner | Thunderbolt 5: The Next Generation (press deck) |
Protocol: Thunderbolt 5 — maximum bandwidth (Gbps) |
2026-08-19 |
| S9 | Apple | Manufacturer | About the Apple Thunderbolt Pro Cables |
Cable record (not evaluated by the public tools) |
2026-08-19 |
| S10 | Apple | Manufacturer | Apple unveils new Studio Display and all-new Studio Display XDR |
Apple Studio Display — release year |
2026-08-19 |
| S11 | Apple | Manufacturer | MacBook Pro (14-inch, M3 Pro or M3 Max, Nov 2023) - Tech Specs |
Apple MacBook Pro 14-inch (host device, not evaluated by the public tools) — bandwidth (Gbps), capability GPU record (host-side, not evaluated by the public tools) |
2026-08-19 |
| S12 | Apple | Manufacturer | Studio Display - Technical Specifications - Apple |
Apple Studio Display — device type, native resolution, refresh rates, input: protocol |
2026-08-19 |
| S13 | CalDigit | Manufacturer | Thunderbolt 4 Dock | TS4 | CalDigit |
CalDigit TS4 — device type, connection to the laptop, maximum Power Delivery, video outputs |
2026-08-19 |
| S14 | Dell | Manufacturer | Dell Docking Station WD19S User Guide — Docking specifications |
Dell WD19S — device type, connection to the laptop, maximum Power Delivery |
2026-08-19 |
| S15 | Dell | Manufacturer | Dell Docking Station WD19S User Guide — I/O ports |
Dell WD19S — video outputs |
2026-08-19 |
| S16 | Dell | Manufacturer | Dell Thunderbolt Dock WD22TB4 User Guide — Product Specifications |
Dell WD22TB4 — device type, connection to the laptop, video outputs, maximum Power Delivery, capability |
2026-08-19 |
| S17 | Dell | Manufacturer | Dell UltraSharp 27 4K USB-C Hub Monitor - U2723QE Monitor Usage and Troubleshooting Guide |
Dell U2723QE — device type, native resolution, refresh rates, input: maximum refresh rate |
2026-08-19 |
| S18 | Dell | Manufacturer | Dell UltraSharp 27 4K USB-C Hub Monitor U2723QE/U2723QX User's Guide |
Dell U2723QE — display timing |
2026-08-19 |
| S19 | Dell | Manufacturer | XPS 13 Plus 9320/XPS 9320 Setup and Specifications |
Dell XPS 13 Plus (host device, not evaluated by the public tools) — bandwidth (Gbps) |
2026-08-19 |
| S20 | HP | Manufacturer | HP USB-C Dock G5: The Ultimate Connectivity Solution |
HP USB-C Dock G5 — device type, connection to the laptop, maximum Power Delivery, video outputs |
2026-08-19 |
| S21 | LG | Manufacturer | LG 27GP950-B UltraGear Gaming Monitor — official product page |
LG 27GP950-B — native resolution, refresh rates, HDR, DSC support, VRR, input: DSC support |
2026-08-19 |
| S22 | LG | Manufacturer | LG 27MD5KLB-B — Business/Solutions spec table |
LG 27MD5KL-B — device type, lifecycle status, native resolution, refresh rates, HDR, input: maximum refresh rate, input: notes |
2026-08-19 |
| S23 | LG | Manufacturer | LG 27UL650-W 4K UHD LED Monitor — official product page |
LG 27UL650-W — native resolution, HDR, VRR |
2026-08-19 |
| S24 | Granite River Labs | Technical media | A Complete Overview of Differences Between TBT5, TBT4 and USB4 |
Protocol: Thunderbolt 3/4 — maximum bandwidth (Gbps) |
2026-08-19 |
| S25 | PC Monitors | Technical media | Gigabyte M32U review |
Gigabyte M32U — device type, native resolution, refresh rates, HDR, VRR, input: maximum refresh rate, input: DSC support |
2026-08-19 |
| S26 | PC Monitors | Technical media | LG 27UL650 and 27UL850 27 inch 4K IPS models with FreeSync |
LG 27UL650-W — refresh rates |
2026-08-19 |
| S27 | ProDigitalWeb | Technical media | HDMI TMDS vs FRL: What's The Difference And Why It Matters |
Protocol: HDMI 2.0 — encoding overhead (%) |
2026-08-19 |
| S28 | docking-stations.info | Technical media | Lenovo ThinkPad Thunderbolt 4 Dock Review 2026 - Specs & Pros |
Lenovo ThinkPad Universal Thunderbolt 4 Dock (40B00135US) — device type, connection to the laptop, maximum Power Delivery, video outputs |
2026-08-19 |
The engine is tested against a fixed set of golden cases — real devices and modes with a documented expected outcome. These are 6 of them, re-run against the live dataset each time this page is generated. They are engine tests against published specifications, not hardware measurements: no physical testing is claimed.
What it demonstrates: A monitor with its own published timing, over a link with a documented payload: the engine can compute the requirement and compare it.
Documented expectation: Fully compatible. Engine output today: Fully compatible — they match.
What it demonstrates: Timing resolved automatically from the manufacturer's own preset display-mode table — the caller never supplies it.
Documented expectation: Fully compatible. Engine output today: Fully compatible — they match.
What it demonstrates: Same monitor and mode over HDMI 2.0 (TMDS, 8b/10b): it still fits, but with a far thinner margin than DisplayPort. The timing is supplied, because no HDMI timing for this monitor and mode is on file.
Documented expectation: Fully compatible. Engine output today: Fully compatible — they match.
What it demonstrates: The bandwidth fits, but the monitor's maximum color depth is not documented in any consulted source — a monitor-side evidence gap, not a bandwidth problem.
Documented expectation: Unknown. Engine output today: Unknown — they match.
What it demonstrates: No verified timing exists for this mode over DisplayPort. The engine does not guess a pixel clock.
Documented expectation: Unknown. Engine output today: Unknown — they match.
What it demonstrates: This monitor publishes timings for some modes but not this one. Automatic resolution never invents a timing that is not on file.
Documented expectation: Unknown. Engine output today: Unknown — they match.
Laptops and other hosts, cables, Power Delivery and operating-system behavior are not evaluated by the public tools today, so they are not in this matrix. The dataset is grown deliberately, prioritising verified timings and specifications over breadth: the fastest way to turn UNKNOWN into an answer is a verified timing for an existing monitor, not more devices. If you spot an error, see Sources & Corrections.