R9 290 vs 2 R9 280/X

calculator123

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Sep 30, 2013
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I am planning on creating a multi-monitor setup which will include three 1080p screens.

I have no idea whether a single R9 290 will perform better than either 2 R9 280x/2 R9 280. As the R9 290 has 4GB of memory whereas the crossfire will only have 3GB of memory. Also if the crossfire option is better should I use 280X or just a 280 in the crossfire.
 
Solution
R9280x x 2 will have more performance but cost more and use more power than a r9 290. 3gb or 4gb ram won't make much difference.

http://www.pugetsystems.com/labs/articles/Video-Card-Performance-2GB-vs-4GB-Memory-154/