So either the relay itself was bad, or there wasn’t a ground connection on 86. I swapped the relay with the working one for the fan’s high-speed setting, and it made no difference.

There are only five 4-pin fan headers, but NZXT also includes two 8-pin ports that either support its own RGB accessories, or can be split into NZXT 4-pin accessory connectors and standard 4-pin ...

The CAM software also gives you the ability to control NZXT 8-pin RGB devices using the connectors on the motherboard, which can also be split up into 4-pin fan headers and 4-pin NZXT connectors ...

The best PC fans will keep your gaming PC cool and quiet.