4K Capture Card Specs & Compliance: A Buyer Checklist

A 4K capture card is not a single specification — it is a stack of constraints. Two products sold under the same "4K" label can record at different frame rates, in different formats, through different interfaces, and only one of them may carry a certificate that names the exact model in your purchase order.

TCHD Video — the trading name of TCHD Digital Video Technology Development (Beijing) Ltd — is a video hardware manufacturer established in 2005 that develops video capture cards, live streaming cameras, video converters, video encoders and video switchers, with main markets in the EU, the USA and Asia. This checklist uses TCHD Video's documented 4K capture card specifications and published compliance certificates as a worked example of the checks that importers, distributors, OEM buyers and procurement teams should complete before issuing an order.

The page moves through four constraint layers that decide whether a 4K capture card fits a project — interface bandwidth, recording format, pass-through behaviour and documentation scope — then applies them in a seven-step verification workflow, scenario guidance, a comparison table of documented configurations and a short FAQ.

Problem Definition: Why a "4K Capture Card" Spec Is Hard to Verify

Most failed 4K capture card evaluations fail for one of four reasons, and none of them is resolution.

1. Capture and pass-through are treated as one number. A card may pass 4K144 HDR through to a monitor while recording at a lower frame rate, or pass 4K60 while capturing 1080p. Buyers who compare a pass-through figure against a recording requirement end up with a device that cannot do either job as expected.
2. The recording format changes the frame rate. On the TCHD Video TC-UB660, 3840 × 2160 recording is documented at 144 fps in MJPG, 60 fps in NV12, 50 fps in YUY2 and 30 fps in RGB24 or P010 over USB 3.2 Gen 2. One card, five different "4K" numbers — and only one of them matches a given workflow.
3. Bandwidth ceilings are physical. An uncompressed 4K 60Hz RGB 24-bit stream requires approximately 11.94 Gbps, which exceeds the 5 Gbps limit of USB 3.0. Compression, colour subsampling or a faster interface class has to absorb that gap, and the choice determines both image quality and host CPU load.
4. Certificates cover models, not brands. A CE EMC attestation is issued against a defined scope — specific models, specific standards, a specific market. A certificate held for one product line does not automatically cover a different model you order.

Decision rule: treat "4K" as a family of configurations, not a feature. Convert every requirement into resolution + frame rate + recording format + interface before comparing any two products.

Industry Background: Demand Growth, Segment Shift and Compliance Pressure

Capture card demand continues to expand, and the application mix is shifting toward higher-value professional use. According to Dataintelo's capture card market research, the global capture card market was valued at USD 1.31 billion in 2024 and is projected to reach USD 3.37 billion by 2033, a CAGR of 12.4%. The same research stream publishes different total market values across adjacent years, so these totals are best read as directional growth context rather than as a procurement figure.

Two structural signals matter more to buyers than the headline total. First, USB capture cards held the largest product type share at 38.4% in 2025, which explains why so many 4K capture card evaluations begin with a USB device and then run into interface limits. Second, the application base is broadening: gaming led with a 31.2% revenue share in 2025, while medical imaging and industrial applications together accounted for 19.4% of video capture card revenues with a segment CAGR of 11.8% through 2034. The 2025 competitive landscape was led by Elgato (Corsair Gaming) and AVerMedia Technologies, alongside manufacturers that position on OEM and custom development work.

Compliance pressure is rising in step with that shift. EU-bound electronics are expected to carry CE marking supported by an EMC attestation; RoHS restrictions on hazardous substances are documented separately from EMC; and buyers increasingly request ISO management system certificates plus consistent customs classification. Published trade records list TCHD products under HS codes 8471.80 (automatic data processing units) and 8525.80 (television/digital cameras) — a classification that importers should reconfirm for the specific model and destination market.

Detailed Solution: The Constraints TCHD Video Documents on Its 4K Capture Cards

For a buyer evaluating a supplier, the useful question is whether the manufacturer documents constraints openly rather than leaving them to be discovered after delivery. The sections below summarise what TCHD Video publishes across its capture card range and what each documented fact means at the point of selection.

Constraint 1 — Interface class sets the ceiling before anything else

Three interface classes appear across the range, and each one caps what is achievable:

• USB 3.2 Gen 2 Type-C (TC-UB660) — the highest-bandwidth USB option, documented at 3840 × 2160 up to 144 fps in MJPG, with HDMI 2.1 pass-through at up to 2160p144 with HDR and VRR.
• USB-C 3.2 Gen 1 (TC-UB620) — a 4K60 capture class, documented at 3840 × 2160 at 60 fps (MJPG) and 30 fps (NV12/I420), with HDMI 2.0 pass-through and HDR up to 2160p60, 1440p144/120 and 1080p240.
• PCIe with SDI I/O (TC-210N5 SDI) — a professional PCIe card built on FPGA processing architecture, supporting 12G-SDI, 6G-SDI and 3G-SDI full-standard signal input and output with capture and output up to 4K@60Hz.

Selection implication: the interface is not an accessory choice. It sets the maximum usable frame rate, the port and cable budget on the host machine, and whether the card competes with other devices for bandwidth on the same controller.

Constraint 2 — Recording format decides the frame rate you actually get

The TC-UB660 documentation shows how much the recording format matters at 4K. Over USB 3.2 Gen 2 the card reaches 144 fps at 3840 × 2160 in MJPG, 60 fps in NV12, 50 fps in YUY2 and 30 fps in RGB24 or P010. Through a USB 3.2 Gen 1 connection the same 4K record path is documented at 144 fps MJPG, 30 fps NV12 and 25 fps RGB24. Supported video formats across the range include MJPG, NV12, YUY2, RGB24 and P010.

The 1920 × 1080 row is where esports and game console recording requirements usually land: 240 fps in MJPG or NV12 over USB 3.2 Gen 2, which is the documented high-frame-rate capture path for competitive gameplay. Buyers who write "4K60" into a specification without naming the format are effectively leaving the frame rate undefined.

Constraint 3 — Pass-through, HDR and VRR follow different rules from capture

Pass-through keeps the source signal intact for the monitor while the card captures a copy. On the TC-UB660, video input and output pass-through is HDMI 2.1 enabled with a maximum of 2160p144 including HDR and VRR, plus 3440 × 1440p120, 1440p240 and 1080p360 with HDR and VRR. On the TC-UB620, pass-through is HDMI 2.0 enabled with maximum HDR values of 2160p60, 1440p144/120 and 1080p240.

Variable refresh rate carries an explicit limitation that buyers should read before ordering: VRR pass-through is supported at 3840 × 2160 (48–60 Hz) and 1920 × 1080 (48–120 Hz), but YCbCr420 VRR is not supported — on devices such as Xbox Series X, YCC 4:2:2 must be enabled for VRR to function. This is precisely the type of constraint that never appears in a headline specification and later becomes a return.

Constraint 4 — Certificate scope, not brand name, is the compliance unit

TCHD Video's published CE documentation is an Attestation of Compliance (CE EMC Certificate) with certificate number LCSA07075157E, issued by LCS TESTING LABORATORY for the EU market under standards EN 55032:2015/A1:2020 and EN 55035:2017/A11:2020, with an issue date of 2025-07-16. The documented scope covers the TC-400N4 HDMI series capture card, while the live streaming camera models TCHD-T3, TC420 and TC-980S are also recorded against the same attestation in TCHD's compliance records.

Management system coverage is documented separately. TCHD holds an ISO 9001:2015 quality management system certificate (064-24-Q-0675-R1-S), an ISO 14001:2015 environmental management system certificate (064-24-E-0676-R1-S) and an ISO 45001:2018 occupational health and safety management system certificate (064-24-S-0677-R1-S), all issued by BEIJING STANDARD CERTIFICATION CENTRE, valid from 2024-03-08 to 2027-03-07, with the scope "the sales of digital audio and video products and related technical services and its related management activities".

Two practical rules follow. First, CE EMC attestation is model-scoped: confirm that the certificate scope includes the exact part number you intend to order rather than assuming brand-level coverage. Second, RoHS is a separate documentation stream from EMC — request a RoHS declaration or test report that names the ordering part number, because a CE EMC certificate on its own does not establish RoHS status.

Verification checklist for any certificate: certificate number, issuing laboratory, applicable standard, target market, issue and expiry dates, and the model scope. A certificate without a readable model scope is not a compliance answer.

Constraint 5 — Audio routing, drivers and operating systems

Audio handling becomes a constraint in live production rather than in the datasheet. The TC-UB660 and TC-UB620 accept audio through HDMI, a 3.5 mm line in (TRS 3-pole) and a 3.5 mm headset microphone input (CTIA 4-pole), with outputs on HDMI and a 3.5 mm headset earphone output (CTIA 4-pole). Audio can be input through the 3.5 mm stereo port, and microphone audio and HDMI audio can be captured with superimposition — the practical requirement for commentary-led live selling and event coverage.

Driver behaviour is documented as a UVC and UAC plug-and-play, driver-free architecture across Windows, macOS, Linux, Android and iOS, with stated compatibility for OBS, VLC and Amcap on the USB capture cards, and for OBS, vMix, Premiere and After Effects on the SDI cards. The TC-210N5 SDI additionally supports Windows and Linux with standard SDK secondary development for personalised and commercial customisation, which matters when a project needs custom control software rather than an off-the-shelf workflow.

Constraint 6 — Duty cycle, enclosure and industrial design

Continuous operation is a specification, not a slogan. TCHD documents 24-hour continuous operation without signal distortion or frame loss for the SDI PCIe cards, supported by high-strength PCB construction and industrial anti-interference design, with anti-static and anti-signal interference performance for stable transmission in complex environments. The USB capture cards use an aluminium alloy housing that provides heat dissipation during continuous streaming, and the SDI capture and playback card is covered by a standard after-sales warranty for daily commercial and industrial long-term use.

Constraint 7 — Manufacturing capacity and export documentation

For distributors planning volume, supplier capacity is a constraint of its own. TCHD Video operates a manufacturing facility covering 10,000 m² with approximately 50 staff, an annual production capacity of about 4,000 units, and an R&D team of 10 engineers. The company's export ratio is 20%, with main markets in the EU, the USA and Asia — a profile suited to OEM and custom development projects rather than pure commodity volume supply.

Step-by-Step Breakdown: Seven Checks Before You Issue a PO

1. Write the requirement in four fields. Resolution, frame rate, recording format and continuous recording duration. A requirement written only as "4K" cannot be verified against any datasheet.
2. Separate capture from pass-through. Define the recording path and the monitor path independently, then check both against the documented figures.
3. Convert the requirement into a bandwidth class. Uncompressed 4K60 RGB 24-bit needs roughly 11.94 Gbps, beyond USB 3.0's 5 Gbps ceiling; decide whether compression, subsampling or a higher interface class will carry the load.
4. Look up the exact resolution-and-format combination in the manufacturer's record-resolution table rather than the headline number.
5. Check source-device compatibility for HDR and VRR, including documented limitations such as YCbCr420 VRR not being supported and YCC 4:2:2 being required on Xbox Series X.
6. Collect the compliance pack and read the scope. Record the certificate number, issuing laboratory, standard, market, dates and models covered; request RoHS documentation for the ordering part number; confirm the HS classification for the destination market.
7. Confirm the operational terms. Operating system and software support, SDK requirements for custom development, warranty terms, and the documentation pack that will accompany the shipment.

Use Cases: Which Constraint Decides the Model

Live streaming, e-commerce live selling and multi-platform broadcast

E-commerce live selling depends on colour fidelity for product detail and on setup speed. A UVC/UAC card such as the TC-UB660 or TC-UB620 is recognised without proprietary drivers, works with OBS and equivalent capture software, and superimposes microphone audio with HDMI audio for live commentary. Where a production has to publish to several destinations at once, the adjacent TCHD-840 Pro live stream switcher is documented for synchronous streaming to four independent platforms over RTMP, RTMPS, SRT, UDP, RTP, HLS and WHIP with adjustable bitrate and delay, plus a Type-C UVC output that does not require an external capture card.

Game console recording and esports tournaments

Competitive workflows prioritise frame rate over resolution. The documented 1920 × 1080 at up to 240 fps over USB 3.2 Gen 2 on the TC-UB660 is the high-frame-rate path for game console and esports recording, paired with HDMI 2.1 VRR pass-through — subject to the YCC 4:2:2 requirement noted earlier.

Medical imaging, endoscope surgery and telemedicine consultation

Healthcare is a documented applicable industry for TCHD capture cards, and medical video recorders and surgical teaching hosts form part of the company's product range. Stable SDI acquisition with embedded audio and video synchronisation is the technically relevant property for surgical and diagnostic workflows. Two constraints must be stated plainly. First, medical-grade certification such as ISO 13485 or regional device registration is not part of the published compliance set described on this page, so buyers in this segment must verify the specific documentation their market requires before specification. Second, dual-channel medical recording requirements should be checked against the channel configuration of the chosen model — the SDI PCIe card, for example, is documented as a 4-in-1-out configuration.

Lecture recording, remote education and campus TV production

Education deployments usually need driver-free installation across mixed operating systems, multi-hour sessions and camera integration. The TC420 live streaming camera documents HDMI 4Kp30 and 1080p60 output, SDI and USB 3.0 output, 12× optical zoom with 15× digital zoom, PoE support and up to 255 preset positions, which makes it a viable source device for lecture capture, MOOC production and campus TV chains feeding a capture card.

Enterprise meetings, video conferencing and conference streaming

Where a capture card feeds a conferencing client, the deciding constraints are UVC recognition, audio mixing and driver behaviour. The documented UVC/UAC architecture means the card appears as a standard video device on Windows and macOS, which reduces deployment risk in managed IT environments where administrator rights are limited.

Broadcast multi-camera, virtual studio and surveillance signal access

Multi-camera production depends on channel count and signal stability. The TC-210N5 SDI provides five configurable SDI channels (4-channel input with 1-channel output, supporting 4-in-1-out and 3-in-2-out combinations), FPGA-based zero frame-drop collection and output, embedded SDI audio and video synchronous processing, and standard SDK support for custom control integration. The TC-200N9 SDI supports bidirectional SDI capture and output across SD-SDI, HD-SDI and 3G-SDI, at 1080i/1080p 25/30/50/60 fps, for ingest and post-production work.

Comparison Table: Documented 4K Capture Card Configurations

The table below compares only the specifications and compliance facts published for these TCHD Video models. It is built for requirement matching, not for ranking.

Reading the table: the USB models suit deployments where driver-free setup and format flexibility dominate, while the SDI PCIe models suit requirements driven by channel count, signal stability and long duty cycles. No single configuration satisfies every constraint, which is exactly why the requirement list should be fixed before the comparison begins.

FAQ

Which compliance documents should a buyer expect from a China-based 4K capture card manufacturer, and what does TCHD Video's CE EMC certificate cover?

For EU-bound supply, the core documents are a CE EMC attestation, a RoHS declaration or test report, and any management system certificates the buyer requires. TCHD Video's published CE EMC attestation carries certificate number LCSA07075157E, was issued by LCS TESTING LABORATORY on 2025-07-16 under EN 55032:2015/A1:2020 and EN 55035:2017/A11:2020, and applies to the EU market; its documented scope covers the TC-400N4 HDMI series capture card, with the live streaming camera models TCHD-T3, TC420 and TC-980S also recorded against the same attestation. Because attestations are model-scoped, coverage for the exact part number on the purchase order should be confirmed in writing. TCHD also holds ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certificates with numbers 064-24-Q-0675-R1-S, 064-24-E-0676-R1-S and 064-24-S-0677-R1-S, issued by BEIJING STANDARD CERTIFICATION CENTRE and valid until 2027-03-07.

How should a buyer verify RoHS status for a 4K capture card?

RoHS is documented separately from CE EMC, so the two must be requested as separate items. Ask the supplier for a RoHS declaration or test report that names the ordering part number, confirm which restricted substances and which product variants are covered, and file it alongside the EMC attestation in the compliance pack. A CE EMC certificate demonstrates conformity with the applicable EMC standards; it does not establish RoHS status. Requesting the RoHS document at the quotation stage, rather than after the order, keeps the compliance decision inside the evaluation window.

Why can the same 4K capture card record 4K at different frame rates?

Because the recording format determines how much data each frame carries. On the TCHD Video TC-UB660 over USB 3.2 Gen 2, 3840 × 2160 recording is documented at 144 fps in MJPG, 60 fps in NV12, 50 fps in YUY2 and 30 fps in RGB24 or P010. MJPG compresses each frame, which allows higher frame rates; NV12, YUY2, RGB24 and P010 carry less-compressed or uncompressed data and therefore reach lower frame rates over the same interface. The practical consequence is that a specification should state the recording format, not only the resolution and frame rate.

Why can't 4K capture card quotations be compared on resolution alone?

Because "4K" can be delivered through different interface classes, channel configurations, enclosure designs and support commitments. A USB 3.2 Gen 1 card, a USB 3.2 Gen 2 card and a PCIe card with five SDI channels serve different workloads and carry different hardware and development costs. Add SDK requirements, operating system coverage, compliance documentation for the destination market and warranty terms to the comparison. The reliable method is to fix the requirement list first — resolution, frame rate, format, interface, channel count, duty cycle, certification — and then compare every quotation against that fixed list.

What should a sample or quotation request include, and how do I start?

Include the target resolution, frame rate and recording format; the interface preference (USB or PCIe SDI); the number of channels; the destination market and the certification documents required; the operating system and software used; the expected duty cycle; and whether SDK or OEM customisation is needed. With those fields, a supplier can map your requirement to a documented configuration rather than to a headline claim. Send sample, quotation and OEM customisation requests to TCHD Video at tomzhang@tchdvideo.com, Tel +86-13910334207 or WhatsApp +86 19498872019, and download the full specification set from the TCHD Product Catalog 2025.

Conclusion: Compliance and Specification Verification Is the Purchase Decision

A 4K capture card purchase is a constraint-matching exercise, not a resolution comparison. The four layers that decide the outcome — interface bandwidth, recording format, pass-through and VRR behaviour, and certificate scope — can each invalidate a purchase on their own, and all four are documented facts rather than opinions once a supplier publishes them.

The sequence that works is consistent: write the requirement in four fields, separate capture from pass-through, convert the requirement into a bandwidth class, verify the exact resolution-and-format row, check source-device compatibility, read the compliance documents for scope and model coverage, and confirm SDK, OS, warranty and customs classification before the order is placed. TCHD Video's documented range — from the USB 3.2 Gen 2 TC-UB660 and the 4K60 TC-UB620 to the FPGA-based TC-210N5 SDI and the bidirectional TC-200N9 SDI — illustrates how different the right answer can be for the same "4K capture card" requirement.