- HDMI 2.0 passthrough supporting up to 4Kp60, 1440p144, and 1080p240 with VRR and HDR
- UVC class compliance enables driverless plug-and-play operation across Windows streaming applications
- Sub-50ms capture latency with dedicated 3.5mm line-in and line-out hardware audio routing
- Capturing at 4Kp60, 1440p144, or 1080p240 relies on compressed MJPG encoding
- Uncompressed true-color RGB24 capture is restricted to 1080p60
- Demands significant host decoding resources with a minimum Intel Core i7 or AMD Ryzen 7 requirement
Overview
Routing video signals through a PCIe Gen3 x1 host interface, the ezcap334P manages high-definition video ingest by balancing bus throughput against encoding format flexibility. The card integrates HDMI 2.0 input and output ports capable of handling up to 2160p60, 1440p144, and 1080p240 passthrough streams with full support for Variable Refresh Rate (VRR) and High Dynamic Range (HDR). While the physical PCIe Gen3 x1 connection provides direct motherboard integration and sub-50ms latency, the bus bandwidth allocation creates distinct capture format thresholds: uncompressed NV12 and I420 streams are capped at 3840×2160 at 30fps and 2560×1440 at 60fps, requiring the pipeline to shift to compressed MJPG formatting to achieve 4Kp60, 1440p144, and 1080p240 recording. True-color RGB24 capture remains restricted to a 1080p60 ceiling.
Built onto an internal add-in card measuring 5.94 x 4.76 x 0.87 in (151 x 121 x 22 mm), the hardware incorporates dedicated 3.5mm TRS analog line-in and line-out jacks directly alongside the HDMI ports, facilitating hardware-level audio mixing and localized monitoring without requiring additional sound cards. A multi-color status LED provides immediate operational feedback for signal detection and active states. Thermally, the card dissipates heat passively within standard host chassis airflow, drawing power directly from the PCIe expansion slot without requiring auxiliary power leads.
From a software integration standpoint, adoption of the USB Video Class (UVC) protocol establishes driverless plug-and-play operation across 64-bit Windows 10 and Windows 11 environments. By eschewing proprietary kernel-level drivers, the board avoids OS update conflicts and maintains seamless compatibility with standard broadcast software. However, handling high-bandwidth MJPG and YUY2 decoding introduces notable host processing demands, establishing a recommended hardware floor of an Intel Core i7-6xxx or AMD Ryzen 7 processor paired with an NVIDIA GeForce GTX 10-series graphics card to ensure steady capture performance.
Technical Specifications
| Brand | ezcap |
| Model | ezcap334P 4K PCIe Video Capture Card |
| Interface | PCIe Gen3 x1 |
| Video Input | HDMI 2.0 |
| Video Output (Passthrough) | HDMI 2.0 |
| Audio Input | HDMI, 3.5mm Line-In (TRS) |
| Audio Output | HDMI, 3.5mm Line-Out (TRS) |
| Max Passthrough Resolutions | 2160p60, 1440p144/120, 1080p240 |
| Variable Refresh Rate (VRR) | Supported |
| High Dynamic Range (HDR) | Supported |
| Max Recording Resolutions | 3840x2160 (60fps MJPG, 30fps NV12/I420), 2560x1440 (144fps MJPG, 60fps NV12/I420, 50fps YUY2), 1920x1080 (240fps MJPG, 120fps NV12/I420, 60fps YUY2/RGB24) |
| Supported Video Formats | MJPG, NV12, I420, YUY2, RGB24 |
| RGB24 Maximum Resolution | 1080p60 |
| Capture Latency | <50ms |
| Driver Standard | UVC (Driver-Free) |
| Status Indicator | Multi-Color LED |
| Dimensions | 5.94 x 4.76 x 0.87 in (151 x 121 x 22 mm) |
| Operating System Compatibility | Windows 10 / Windows 11 (64-bit) |
| Minimum System CPU | Intel Core i7-6xxx / AMD Ryzen 7 |
| Minimum System GPU | NVIDIA GeForce GTX 10-series |
Primary Sources & Audited Citations
Recommended Alternatives in Capture Cards
At a Glance
How reliable is the ezcap334P 4K PCIe Video Capture Card Review: PCIe Bandwidth Meets High-Refresh Passthrough according to Mizex audits?
Choose the ezcap334P for affordable desktop video capture with smooth high-refresh passthrough, provided your workflow does not require uncompressed 4K60 color recording.
What are the known quirks or drawbacks of the ezcap334P 4K PCIe Video Capture Card Review: PCIe Bandwidth Meets High-Refresh Passthrough?
Our reliability audit identified the following documented caveats:
- Capturing at 4Kp60, 1440p144, or 1080p240 relies on compressed MJPG encoding
- Uncompressed true-color RGB24 capture is restricted to 1080p60
- Demands significant host decoding resources with a minimum Intel Core i7 or AMD Ryzen 7 requirement
What are the key engineering highlights of the ezcap334P 4K PCIe Video Capture Card Review: PCIe Bandwidth Meets High-Refresh Passthrough?
The top strengths recorded in our evaluation include:
- HDMI 2.0 passthrough supporting up to 4Kp60, 1440p144, and 1080p240 with VRR and HDR
- UVC class compliance enables driverless plug-and-play operation across Windows streaming applications
- Sub-50ms capture latency with dedicated 3.5mm line-in and line-out hardware audio routing