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Yes, I've also replaced the PSU and drivers fans (see first photo in this thread).

However, when I put in the Noctua and turbofan (see picture below) they don't turn at all (before you ask, they work fine when hooked directly to and external 12V supply).

I've swapped the old and new heads a few times, and always the same: old fans ok, new fans nothing. Am I missing something here?