Sony INZONE M9 (SDM-U27M90)

Monitors

This is what matters about Sony INZONE M9 (SDM-U27M90).

About

A rare 27" monitor with true 96-zone FALD backlighting for decent HDR density — but its internal clocks bifurcate refresh by port: 144Hz over DisplayPort collapses to a hard 120Hz ceiling over HDMI 2.1.

Specs

HDMI version
2.1
DisplayPort version
1.4
Max resolution
3840x2160@144Hz
VRR range
24-120Hz
Requires DisplayLink driver
No

Ports: 2× HDMI 2.1, 1× DisplayPort 1.4, 1× USB-C, 1× USB-B, 3× USB-A and 1× Audio 3.5mm

Confirmed with

  • Notebook (generic)

    144Hz is only reachable via DisplayPort — the HDMI 2.1 controller rigidly caps refresh at 120Hz. Its HDMI circuitry is also unusually sensitive to latency fluctuation, with users reporting strobing flicker and signal loss when running high-def eARC audio simultaneously with VRR gaming.

    Source: www.reddit.com
    Confirmed — caveat
  • Steam Deck

    Mixed reports — works for some users, others report compatibility issues.

    Source: www.reddit.com
    Confirmed — caveat
  • ROG Ally

    Built-in KVM lets a single USB-C cable carry video plus 2 USB-A peripheral ports.

    Source: www.reddit.com
    Confirmed — caveat
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