This is the base level Asus RoG Strix 1080 which has a lower clock speed out of the box. Real world difference isn't that big compared to the O8G model which is significantly more expensive.
As always with GPUs, the silicon lottery will determine just what the card clocks at but for under $700 this is a good price for one of the best third party 1080's on the market with excellent thermal performance.
Note that the item is temporarily out of stock however Amazon generally do not take long to restock and from memory they don't take payment until the item is processed for shipping.
Staticice: http://www.staticice.com.au/cgi-bin/search.cgi?q=ASUS+Strix+…
Obligatory first post, hope I didn't screw this up comment.
Edit: Just noticed the Turbo model can be had for ~641AUD delivered here: https://www.amazon.com/dp/B01HDUVJ2M
I'd spend the extra money myself but it's a good option for those who have a tighter budget.
The Turbo deal is still active
RGB master race doosh doosh doosh!