PLEASE don't use that one as-is - I pulled it as an example from a reddit thread, and it probably won't match your card (although it might). You can see that the values are seperated by commas, one setting for each card. I only have 1 GPU myself, so I am no expert, but been reading up in anticipation of my second one arriving later this month.
Rit.
You only need to have different settings for multiple cards if they are different GPU e.g 290x and 280x
mine both work fine from the example .bat file I posted