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AVerMedia Streamer Ultra 2.1 vs MiraBox HSV321 4K Capture Card: Comparison
AVerMedia Streamer Ultra 2.1 and MiraBox HSV321 4K Capture Card differ on form factor: AVerMedia Streamer Ultra 2.1 at Compact external box, 113 x 70 x 28mm, 190g, MiraBox HSV321 4K Capture Card at External USB.
Specs
| Specification |  |  |
|---|---|---|
| Form Factor | Compact external box, 113 x 70 x 28mm, 190g | External USB |
| Brand | AVerMedia | MiraBox |
| Connection Type | USB 3.2 Gen 2 Type-C (10Gbps) | USB-C / Thunderbolt |
| Max Recording Resolution | 2160p60 (4K60) on Windows; capped at 2160p30 (4K30) on macOS | 1080p60 |
| Passthrough Resolution | HDMI 2.1 mode: 2160p144, 1440p240, 1080p360 with HDR/VRR. HDMI 2.0 default mode: 2160p60, 1440p144, 1080p240 with HDR — both meaningfully higher than the capture ceiling in refresh rate | 4K60 |
| Model | GC535 | HSV321 |
Verdict
AVerMedia Streamer Ultra 2.1
7 / 10 Expert Rating
A genuinely capable 4K60 external capture box with flexible HDMI 2.1/2.0 switching for live-commerce and DSLR streamers, held back only by its brand-new status and a macOS capture cap at 4K30.
MiraBox HSV321 4K Capture Card
5 / 10 Expert Rating
Genuinely competitive spec for the price, with the build and software consistency trade-offs typical of budget capture brands.
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