Bubba200

If you really need to upgrade, get a second one. If you can wait, then wait and see if the R-300 series will be released soon. I would wait because tbh a 280X is still nice actually. And there are issues with crossfire in some cases and the 970 won't give a huge boost. It will be noticable, but it isn't extreme.
 
I would just wait, but oh well

Just check how the cable connects to the PSU, usually if it's directly attached to the PCB it's its own rail, if it splits from, or is paired to another cable, then they are probably the same.
Each rail handles a little bit over 25A, each card will want around 21+ Amps, so it's ok for that PSU, but not for plugging 2 cards on the same rail.

if you want to run a 290
 
go back with the FX6300 with the 970 board i picked for you

280 is probably the best price to performance wise

What's your budget and currency?

Get the 280.
 
 
In order of appearance:
*play games
*The Witcher 3
*Battlefront
*Dual (x2)
*recommend
*would
*recommend
*well
*budget
*performance
 
Just going and helping. Not being a dick.

Imo the R9 280 is worth the extra. Games defently benefit from more than 2GB at the moment. Also the R9 280 has quite more power than the 270X. Those few bucks will be worth it, especially in future games.

I think if you could afford to fit the 280 in your budget, go for it.

Very nice!  It also looks like there's a mail in rebate to save you some more cash.

This is we're I am buying it from...
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202099