If your display supports 4K but the SSIS976 stays at 1080p, the automatic handshake is likely failing. Enter the menu. Toggle "Auto-Detect Resolution" to OFF . Manually select 2160p (30Hz or 60Hz) .
Many "fixed" versions also include 60fps interpolation (MEMC), which smooths out motion blur. Why SSIS-976? ssis976 4k fixed
The alphanumeric string "SSIS-976" is also a common identifier for specific digital video releases. In this context: If your display supports 4K but the SSIS976