Should I go crossfire my 280X or buy a new card?

StaticStrength

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Aug 3, 2014
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Hi guys, I'm thinking about CFing my Asus DCu2 R9 280X with XFX double-d R9 280X, but i need to buy a new PSU so it will cost me something like 390X i think, so should I buy a new GPU or go for CF.

My PSU is 750 Watt 80+ Bronze Thermaltake Smart and CPU is FX8350 without OC.