Is THIS the correct adapter to connect a Phantek Halos RGB fan frame to a conventional RGB header on a motherboard? Below is a picture of the Phanteks connector (the female end I presume) that I'm trying to match to a motherboard that has a conventional (12V/G/R/B) RGB header.
Sorry, that does not appear to be what you need. What you show looks like it consists of male and female connectors of the SAME locking type. They are what Phanteks uses on their frames, and those do NOT fit the "standard" 4-pin RGB headers on most mobos. Their frames do have cables that allow you to daisy-chain several from one source, but you do need an adapter to go from the Phanteks locking connector to the mobo standard 4-pin header.
Your reply pointed out correctly that Phanteks makes such an adapter, and said yes, IF that's what OP has, it will do the job. BUT the photo OP posted does NOT show the real Phatenks adapter - it appears to be a simple extension cord with Phanteks locking connectors. that is why I posted a link to the correct item you called attention to.