Which should work better?

[sudcell]

I have 4690k
8gb Corsair DDR3
H100i cpu cooler
And a R9 270 MSI

Should i go for another R9 270 and corssfire?

Or should i get a R9 290 MSi??
Which one of the above two will perform better??

Any more suggestions are welcomed

 

[herrwizo]

Two 270s in crossfire are similar to a single 290 in terms of performance, with largely unpredictable fluctuations: in some games 2 cards yield 20% more, in some they yield 30% less. In the end, they are about equal, but the funny thing is that 2x270s wtill end up using less power than a single 290. I would still opt for a 290 - if nothing else, to avoid all the crossfire related issues like microstuttering, driver optimisation, unpredictable scaling with games and so on.