By the way 7970 Ghz edition is not available in Thailand yet T_T, but I hope it comes out soon. But just in case, is there any other best value alternatives? Should I get just get the non-ghz edition instead?
Not yet in Thailand (but may be soon). I am thinking about buying one from Newegg but the guy who will build my PC said I will have to claim for the warranty by myself if the GPU is broken, and I don't know how to deal with the warranty things, so I am kinda want to buy from the local shop instead because it will cost time and money to ship back and forth to Newegg.
I believe prices are cheaper and parts are more update in Australia, so if it were me I would buy the parts there.
You'll need to contact the manufacturer for the specific part about the warranty though, but I'm sure it'll work. You'll be paying for shipping.
Not necessarily cheaper, prices are inflated quite a bit more down south (Typically we pay around 15% more for graphics cards, the Matrix 7970 for example is 689 here, and even a reference 670 from galaxy is like $400.