
RockTek GX1
Score: 78/100
Formuler Z12 Ultra
Score: 79/100Rankings

The Formuler Z12 Ultra is a high-end Android 12 streaming player offering 4K 60 fps video with Dolby Vision, HDR10+ and Dolby Atmos, backed by 4 GB RAM and 128 GB storage. Its modest CPU and limited USB ports may fall short for power users. It best suits IPTV enthusiasts and home-theater setups with fast Wi-Fi 6E or gigabit LAN.

The RockTek GX1 UHD Streamer offers a compact Google TV experience with Dolby Vision, HDR10+, and Dolby Atmos, backed by a Realtek processor, 4 GB RAM and HDMI 2.1. Its drawbacks include a non-Gigabit Ethernet port, limited USB-2.0 speeds, and potential heat issues. Best suited for users who value a small form-factor and premium video/audio without needing ultra-high-bitrate wired streaming.
| Attribute | ![]() | ![]() |
|---|---|---|
8,294,400 pixelsbest | 8,294,400 pixelsbest | |
60 Hzbest | 60 Hzbest | |
4 GBbest | 4 GBbest | |
32 GB | 128 GBbest | |
| ↓ lower better | 0.115 kgbest | 0.46 kg |
| ↓ lower better | — | 258.8 mmbest |
2 countbest | 2 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Audio(1) | ||
Supported Audio Formats | Dolby Atmos, Dolby Digital | Dolby Atmos, MPEG-1 Layer 1/2/3 (2-CH), MPEG-2 Layer 1/2, HE-AAC v1/v2, DTS |
Connectivity(1) | ||
Wi‑Fi Standard | Wi‑Fi 6 | Wi‑Fi 6E |
Performance(2) | ||
CPU | Realtek RTD1325TPV | Realtek RTD1319C quad-core |
GPU | Mali-G57 | Mali-G57 MC1 |
Storage(1) | ||
Internal Storage (GB) | 32 GB | 128 GB |
Build & Design(2) | ||
Weight (kg) | 0.115 kg | 0.46 kg |
Dimensions (H×W×D) (mm) | 22.86x93.98x93.98 mm | 258.8 mm |


Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the GX1 for its striking Dolby Vision and HDR10+ performance at 2160p60, smooth AV1 playback, and the polished Google TV 12 experience. However, they point out the 100 Mbps Ethernet as a bottleneck for high-bitrate local streaming and note the absence of VC-1 support and limited ventilation as drawbacks for power users.
Everyday users overwhelmingly praise the GX1's video and audio quality, compact size, and responsive interface, often calling it a top-line product that outshines competitors. The most common complaints revolve around screen-resize issues on certain LCD TVs and the lack of Gigabit Ethernet for heavy NAS-based media consumption.

Professional reviewers view the Z12 Ultra as a significant upgrade over the Z11 Pro, highlighting its faster Realtek RTD1319C processor, doubled 128 GB storage, Wi-Fi 6E support, and expanded HDR and audio codec suite. They commend the inclusion of QMS, Dolby Vision, and Dolby Atmos, positioning the device as a premium choice for high-end IPTV and home-theater setups.
Limited user feedback suggests most owners are satisfied with the device's performance and feature set, especially the pre-installed IPTV app and voice-controlled remote. However, a subset of users expressed a wish for a more powerful CPU and additional RAM, indicating the device may fall short for enthusiasts seeking top-tier hardware.
“topline product with great RTD1325 performance.”

“"Ok" rating due to this.”

“hoped also on better specs. Better cpu and 6gb ram,”


