For SV1 to deliver HDR, you must enable "Use HDR" in Windows Settings (System > Display > Windows HD Color). If HDR is off, Netflix may still send the SV1 profile, but it will be tone-mapped to SDR, often looking washed out. You want them both on.
: Older PCs without dedicated SV1/AV1 hardware decoding will experience high CPU usage , leading to fan noise or stuttering. netflix sv1 pc