What PSU needed?

[Zappysam5533]

Just wondering if I should get above 750w because of the Crossfire 270x's

Motherboard: GIGABYTE G1.Sniper Z87 LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX
RAM: G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900)]
CPU: Intel Core i7-4770K Haswell 3.5GHz LGA 1150 84W Quad-Core
GPU: Dual MSI R9 270x 2GB running in Crossfire
Case: NZXT Phantom 410
HDD: 1Tb SATA 3Gb/s
SSD: Samsung 840 EVO 250GB 6Gb/s
Cheap standard 16x DVD Burner

Also wondering if I should even crossfire 270x's or if I should just get 1 better card, but I want to crossfire because I already own a 270x.

 

[aevm]

No, the minimum recommendation for R9 270x CF is 700W.
http://www.realhardtechx.com/index_archivos/Page362.htm

 

[Zappysam5533]

No, the minimum recommendation for R9 270x CF is 700W.
http://www.realhardtechx.com/index_archivos/Page362.htm

Thanks