Guermok 4K HDMI Capture Card - USB 3.0 Low-Latency Capture

In this review of the Guermok 4K HDMI Capture Card, the bottom line is simple: it is aimed at streamers and gamers who need reliable, high-frame-rate capture with flexible audio routing. The device stands out for its ability to capture up to 4K@60Hz input over USB 3.0 while offering a near-real-time HDMI loop-out for monitoring. The build and passive cooling make it suitable for long sessions, and the extra audio I/O-including mic and line inputs plus four output options-means content creators can consolidate video and multi-channel audio without complex mixers.

Key Features

• USB 3.0 High-Speed Capture: Provides low-latency capture of up to 4K@60Hz and handles high-frame-rate inputs like 1080P@240FPS and 1440P@144FPS for smooth gameplay recording.
• Real-Time HDMI Loop-Out: Delivers up to 4K@30Hz passthrough so streamers can use an external monitor or portable display for near-zero latency preview while recording.
• Dual Audio Inputs: Includes 3.5mm mic in and line in ports to record commentary or external audio devices directly into the capture workflow.
• Four Audio Outputs: Offers simultaneous capture device audio, HDMI passthrough, audio out, and speaker out so both headphones and speakers can be used for monitoring or group playback.
• Aluminum Passive Cooling: All-aluminum body dissipates heat without a fan, keeping the unit stable and quiet during extended streaming or recording sessions.
• Software Compatibility: Works with OBS, Streamlabs, and major recording software on Windows and macOS for easy setup with existing streaming toolchains.

Who It's For

The Guermok capture card is best for solo streamers, console gamers, and content creators who need high-resolution capture with flexible audio options and reliable passthrough. Its support for 4K input and high-frame-rate signals makes it a good match for modern gaming consoles and high-end PCs, while passive cooling and USB 3.0 connectivity simplify a studio or mobile rig.

Those who should look elsewhere include users requiring hardware-encoded recording at specific codecs not mentioned here, or professionals needing an internal PCIe capture card for multi-channel simultaneous inputs; this is an external USB solution focused on one or two HDMI sources and audio integration.

Pros & Cons

Pros

• High-quality 4K@60Hz capture and support for very high frame-rate inputs deliver smooth, detailed recordings.
• Real-time 4K@30Hz HDMI loop-out provides an effective preview without extra latency for live streaming.
• Comprehensive audio I/O with mic/line in and four outputs enables flexible monitoring and group playback.
• Durable aluminum body with passive cooling keeps the unit quiet and thermally stable during long sessions.

Cons

• HDMI loop-out is limited to 4K@30Hz passthrough, so external displays will not receive the full 4K@60Hz preview.
• As an external USB device, it relies on a host computer and USB 3.0 bandwidth rather than internal PCIe throughput.

Specifications

Our Verdict

The Guermok 4K HDMI Capture Card is a practical, well-rounded external capture solution for streamers and gamers who need high-resolution capture, flexible audio routing, and quiet, passively cooled operation. It delivers clear value for creators consolidating video and audio inputs without a bulky setup, though users seeking internal PCIe performance or 4K@60Hz HDMI passthrough may prefer other form factors.

Frequently Asked Questions

Can I use this with OBS?
Yes. The capture card is compatible with OBS, Streamlabs, and other major streaming and recording software on Windows and macOS.

Does the loop-out mirror full 4K@60Hz?
No. The HDMI loop-out supports up to 4K@30Hz passthrough for real-time preview, not 4K@60Hz.

Is active cooling required?
No. The unit uses an aluminum body with passive cooling and is designed to stay cool during extended sessions.