If the 6670 doesn't need an external power connector, the 6570 shouldn't.
Easy choice though, get the 6570.
Thank you for quick reply
does the 6570 blow away the HD5670 or is only marginally better?
I was set on the 5670 but then I saw the 6570
I do like the Gddr5 of the 5670 and higher clock speeds
I used GPU review to do a side by side match up and
it was close
If anybody has link to game benches between the two that would be great