i cant buy at newegg because it doesnt acept internacional credit cards.
the diffrence to the ddr4 version is that the Memory Clock is 2200MHz(200mhz more)(does that make it much faster?) should i wait for it to be on amazon or ebay or buy a normal version of 4670?
What you could also do is go to your bank or even a walmart and load a debit/gift card. I know through my bank I can load a mastercard debit gift card and I used that on newegg with no trouble. I think the fee was like 4 bucks for mine, but could be more depending where you get it.