Preface I'm no component level guy.
Are there separate paths for the 4 pin connector power then the slot power? Moved it out of the backplane and hooked to a PSU separate and it seems to do ok now...leaving it like this I guess just more curious why that worked. Had moved it out more or less to play and check power to places with a multimeter but it worked...lol
looks like it was a bad connection between the backplane and the blade.