HD LINK old and New Delay

If I am using 720P out of Atem via sdi into a HDlink either the older version or the newer one that converts to DVI what is the delay added in the HDlink?
Chain is Sony ex3 genlocked sdi 720p to Atem out sdi to HDLink DVI to Panasonic Dw5500 Native 720P Trying to minimize any delay for ISO

Thanks
Sharyn