Are Expensive HDMI Cables Worth It for a Retro Scaler Setup: Certified Ultra High Speed vs Generic
You are standing in Golden Computer Centre in Sham Shui Po, and a vendor is holding two cables. One is a generic HDMI lead, the other wears a hologram and costs noticeably more. You have just bought a RetroTINK 4K, you have a Super Famicom with a high-end RGB SCART cable, and you are wondering if the expensive HDMI cable is a scam. The answer is yes and no, and the difference is what signal your scaler is sending, not what your TV can display.
The Most Important Question: Are Expensive HDMI Cables Worth It for Retro Gaming?
What Failure Looks Like
The real test is not what the cable looks like. It is what happens on screen when the signal gets marginal. Generic cable failure in a retro chain looks like sparkles across the image, a screen that blinks to black every few seconds, or a handshake loop where the scaler and TV argue about EDID and HDCP 2.2 until you unplug something. The 2023 RTINGS test, which used a signal generator and eye diagram analysis to measure signal integrity, found that at lengths under 2 metres, every cable they tested, including generic non-certified ones, passed 4K120 HDR. At 5 metres and longer, only Ultra High Speed certified cables consistently passed. That is the whole story in one paragraph: short cable, generic works; long cable, compliance matters.
